CN101163909A

CN101163909A - Metal gasket

Info

Publication number: CN101163909A
Application number: CNA2005800127482A
Authority: CN
Inventors: 约格·施米茨
Original assignee: Federal Mogul LLC
Current assignee: Federal Mogul LLC
Priority date: 2004-02-26
Filing date: 2005-02-23
Publication date: 2008-04-16

Abstract

A multilayer metal gasket includes at least two metal gasket layers formed with an aligned opening and aligned opposing sealing beads surrounding the opening. A partial stopper layer is interposed between the gasket layers and is of lesser area than either of the gasket layers. The partial stopper layer extends from the opening outwardly beyond the sealing beads and is fixed to one of the layers on only one side of the sealing beads and is free on the opposite side.

Description

Metallic shim

It is the preference of the U.S. Provisional Application 60/547,981 on February 26th, 2004 that the application requires the applying date.

Background of invention

1. technical field

The present invention relates to the composite bed metallic shim, in particular, the present invention relates to a kind of metallic shim that has at least the two-layer movable flange layer that separates by the backstop layer to form.

2. background technique

The composite bed metallic shim is usually used on the motor, is used to provide the sealing between two parts that connected by bolt or other fastening device, for example between cylinder head and the engine block, or the sealing between outlet pipe and the core body.

In related domain, known have multiple gasket construction and different purposes be provided.A main application part of the present invention is exactly the thickness that is used for reducing pad, and under low-down contact pressure condition, pad also can provide effective seal, even uneven this pad in seal interface also can reach sealing effect, the for example application on cylinder head, cylinder buss protrudes from the sealing cover at engine block top.Under these imperfect air-proof conditions, be difficult to design a kind of seal ring and reach the required all conditions in this application.

As U. S. Patent 5,544,899 disclose a kind of composite bed metallic shim, and this pad has a pair of functional layer, and functional layer is provided with matching hole and is centered around the flange of the centering on every side in hole.A local backstop layer (partial stopper layer) between be centered around between two functional layers respective aperture around.In certain embodiments, the backstop layer is the extend through sealing edge of part only, at backstop layer under the clamping force effect sealing edge is flattened on the backstop layer.The most important thing is that sealing edge is flattened the back fully and produces to a certain degree excess compression to I haven't seen you for ages, sealing edge can produce permanent deformation, will reduce the sealability of pad like this.At least among the other embodiment, the backstop layer has been crossed over the whole width of sealing edge, and both sides are all welded, thereby and is deformed of two sealing edges relative with the position and constitutes the socket relation.In the present embodiment, can be understood as the distortion that the backstop layer can limit spacer layer, the backstop layer is welded on the spacer layer at the two ends of sealing edge.Therefore, confined functional layer is bigger than the pressure of other layer, and the increase of the pressure that pad is total makes it be difficult to satisfy to reducing the requirement of spacer thickness and reduction pressure.

U. S. Patent 5,628,518 disclose the composite bed metallic shim of another form, and it is complete one deck and can not be part that this pad requires mesosphere.Although the pad of this form can be used for multiple occasion, complete mesosphere has increased the thickness of pad, is therefore requiring this pad of the very thin occasion of spacer thickness just inapplicable.

Purpose of the present invention is exactly the defective that has overcome or farthest reduced existing pad, and the present invention is specially adapted to require the little and low occasion of pressure of spacer thickness.

Summary of the invention

According to one embodiment of the present of invention, a kind of structure of composite bed metallic shim comprises that at least one group is first and second layers of pad of plane body substantially, and be provided with at least one to mesopore and at least one relevant sealing edge on each layer spacer layer, the sealing edge is centering mutually relatively, and radially outward be centered around at interval described hole around and outwards protrude from residing plane body separately.This pad also comprises local backstop layer, it is between described spacer layer, and its area is less than arbitrary described spacer layer, the position of described backstop layer from the position of described sealing edge inner radial to radially outer strides across described sealing edge fully, and be fixed on the only adjacent spacer layer of one deck at least, and be free end at the relative opposite side of sealing edge with described sealing edge one side.

An advantage of the invention is and under less relatively pressure, can make spacer thickness minimum and sealing edge be out of shape controlled.

Because the complete extend through sealing edge of backstop layer, the backstop layer just produces beneficial effect, makes all sealing edge pressure basically identicals in each layer on the pad.In addition, the other end is freely because backstop layer and sealing edge one end are fixed, and the backstop layer just can not limit the distortion that the sealing edge on the fixing with it spacer layer produces fully, so the distortion meeting that sealing edge produces everywhere is consistent more.

Description of drawings

In conjunction with following detailed description and drawings, the features and advantages of the present invention can better be understood.Wherein:

Fig. 1 is the partial plan view according to the gasket construction of a most preferred embodiment of the present invention;

Fig. 2 is the amplification view of cutting open along Fig. 1 center line 2-2 direction;

Fig. 3 is the view of similar Fig. 2, but has shown that pad is under the compressive state;

Fig. 4 is the sectional view of another embodiment of the present invention;

Fig. 5 is the sectional view of yet another embodiment of the invention;

Fig. 6 is the sectional view of further embodiment of this invention;

Fig. 7 is the sectional view of another embodiment of the present invention.

Embodiment

In Fig. 1 and Fig. 2, represent that with 10 the composite bed metallic shim comprises a pair of first and

second spacer layers

12,14 and the local backstop layer 16 between this

spacer layer

12,14 at least according to the composite bed metallic shim that first preferred embodiment of the present invention constitutes.

Spacer layer

12,14 material is a resilient blade, as stainless steel or similar material, spacer layer is provided with the hole of different sizes, comprise that at least one (usually having a plurality of) is used for the casing bore 18 of engine block 22 casing top halfs 20, on some motors, engine cylinder 20 also can be furnished with cylinder buss 24 as shown in Figure 2.Casing bore 18 and

spacer layer

12,14 centerings,

spacer layer

12,14 are respectively equipped with and are centered around casing bore 18 flexible sealing edge (sealing bead) 26,28 on every

side.Sealing edge

26,28 is crushed elements of the one the

second spacer layers

12,14, forms protuberance on the spacer layer material, the formation that raises up from the plane at

main body

30,32 places of

spacer layer

12,14 separately of complete flange preferably, sealing edge 26,28.

Sealing edge

26,28 positioned opposite on the one the

second spacer layers

12,14, shown in Fig. 2 embodiment, such centering relation makes sealing edge corresponding mutually.

Sealing edge

26,28 is spaced apart along casing bore 18 radially outwards, determines around casing bore 18 and the

flat site

34,36 of inner radial that sealing

edge

26,28 and casing bore 18 are kept apart.Zone 34,36th, the part on

spacer layer

12,14

main bodys

30,32, they are preferably in one plane or be parallel to each

other.At sealing edge

26,28 radially outer opposite sides have another outerplanar zone 38, the 40 same main bodys 30 that form, 32 some, and in one plane, preferably be parallel to each other, better with inner

radial zone

34,36 are positioned at same plane, and the exposed surface of

spacer layer

12,14 can have one deck to scribble the pad coating 42 of rubber respectively.

Backstop layer 16 between

spacer layer

12,14, more specifically, between sealing

edge

26,28." part " of local backstop layer mean its area than the area of

arbitrary spacer layer

12 or 14 lack many.As shown in Figure 2, backstop layer 16 extends radially outwardly into 38,40 places, zone that just surpass

sealing edge

26,28 from casing bore 18 or near it.Backstop layer 16 preferably adopts Type of Welding to be fixed at least one of

spacer layer

12 or 14 and preferably only on one.Among first embodiment shown in Figure 2, backstop layer 16 is fixed on first spacer layer 12 by soldered splice 41 in sealing

edge

26,28 radially inner positions.An other end 43 of backstop layer 16 arranges with respect to sealing

edge

26,28 radially outwards, and is not fixed in the present embodiment also not have with

adjacent pads lamella

12,14 and connects.Among the first embodiment of the present invention shown in Figure 2 and other embodiment, all can illustrate the backstop layer only an end be fixed, preferably contiguous casing bore 18 radially inner ends, yet when seal ring 10 is clamped under pressure, there be not moving of connection freely with respect to its spacer layer of fixing at the backstop layer the other end of sealing edge opposite side.For first embodiment of the present invention among Fig. 2, as can be seen, backstop layer 16 firmly is fixed on the inner radial zone 34 on first spacer layer 12 between casing bore 18 and the sealing edge 26 especially.The method for optimizing of fixed stop layer 16 is welding, and laser beam welding preferably, but also can use other method, as riveted joint, bonding, middle adhesive layer etc., but is not limited to these methods.In first embodiment, local backstop layer 16 is flat.In addition, in this embodiment, the bearing of trend of the sealing

edge

26,28 in is consistent relatively, the sealing edge 26 on first spacer layer from its main body 30 to outer lug, the sealing edge 28 on second spacer layer 14 along identical direction to first spacer layer, 12 projectioies.The top of the sealing edge 28 on second spacer layer 14 and the bottom connection of backstop layer 16 touch, and the top of backstop layer 16 contacts with the part that first spacer layer 12 strides across sealing edge 26.

With reference to the accompanying drawings 3, it is described to be cylinder buss 24 situation that protrudes from the top cover 44 on the engine block 22 a little.As shown in Figure 3, when cylinder head 46 and engine block 22 are clamped by bolt or analog, pad 10 has enough compression ductilities adapting to the situation that lining protrudes, and can also form suitable sealing between engine block 22 and lining 24 and cylinder head 46.Just can produce the step of generation between the top cover 44 that distortion comes cylinder buss 24 that cross-over connection protrudes and engine body 22 at relative lighter clamping force effect lower levelling plate 10, and another side and cylinder head 46 forms sealing, engine cylinder 20 is sealed fully and can not produce seepage.Because backstop layer 16 only is fixed in a side of sealing edge 26, the distortion of the prevention sealing edge that the backstop layer just can not be whole, and be suitable for pad soft more, more squeezable minimizing thickness.Especially, as shown in Figure 3, when pad was compressed, sealing edge outwards spread out to the flat state compression, and causes the slight mobile of

spacer layer

12,14, for clarity, has done exaggerative displaying among Fig. 3.Spacer layer any such moves or slides and can not limited by the backstop layer, because a backstop layer side of fixing seal edge only, is freely in a relative side 48 in addition.

The structure of second embodiment's pad 110 of the present invention wherein increases by 100 with identical mark and is used for representing identical part as shown in Figure 4.This pad 110 is identical with gasket construction among Fig. 2, and except the second layer 14 is opposite with original direction, so sealing edge 126,128 outwards protrudes mutually dorsad.Another difference is that backstop layer 116 is fixed on second spacer layer 114, although it can be fixed on first spacer layer 112 too.Obviously, all advantages of above-described first embodiment's of the present invention pad 10, second embodiment's of the present invention pad 110 has too.

The structure of the 3rd embodiment's pad 210 of the present invention as shown in Figure 5, wherein identical with first embodiment of the invention pad 10 part mark increases by 200.Pad 210 is consistent with the structure among Fig. 4, and except backstop layer 16 is provided with the flange 50 that a flange 228 on second spacer layer is sleeved on, this backstop layer 16 is bonded on second spacer layer.

Fig. 6 has shown the structure of four embodiment of the invention pad 310, and wherein identical mark increases by 300 and is used for representing identical part.Among this embodiment, the direction of first spacer layer 312 is conversely, so sealing edge 326,328 is mutually to convex, backstop layer 316 be fixed on second spacer layer 314 and be provided with second spacer layer 314 on the flange 52 of sealing edge 328 sockets.

Fig. 7 has shown the structure of fifth embodiment of the invention pad 410, and wherein identical mark increases by 400 and is used for representing identical part.In this embodiment, the structure of pad be consistent shown in Fig. 2, be positioned at except welding position 441 on the radial outer end 443 of backstop layer in sealing edge 426,428 outsides rather than in radial inner end.Backstop layer 416 is not connect freely and with arbitrary layer of spacer layer 412,414 in the radially inner part of flange 426,428.In Fig. 7, can also see and draw engine block 422 liner-less.As the above other embodiments of the invention, this pad 410 is same can be applicable to the belt material cover and on the motor of belt material cover.We think within the scope of the invention, can expect that welding position 441 also can be applicable among arbitrary embodiment of Fig. 4-6 among Fig. 7.

Obviously, according to above method, the present invention can carry out many changes and variation.Therefore, be appreciated that special instruction above enforcement of the present invention is not limited in the claim scope.The present invention is defined by the claims.

Claims

1. composite bed metallic shim comprises:

At least the first and second spacer layers, this spacer layer is a plane body, and be provided with at least one to mesopore and at least one relevant sealing edge on each layer spacer layer, the sealing edge is centering mutually relatively, and radially outward be centered around at interval described hole around and outwards protrude from residing plane body separately;

A local backstop layer, it is between described spacer layer, and its area is less than arbitrary described spacer layer, the position of described backstop layer from the position of described sealing edge inner radial to radially outer strides across described sealing edge fully, and be fixed on the only adjacent spacer layer of one deck at least, and be free end at the relative opposite side of sealing edge with described sealing edge one side.

2. pad according to claim 1 is characterized in that, described backstop layer is fixed at least one spacer layer that is positioned at the sealing edge radially inner side.

3. pad according to claim 1 is characterized in that, described backstop layer only is fixed on the spacer layer.

4. pad according to claim 1 is characterized in that, described backstop layer is fixed on its radial inner end.

5. pad according to claim 4 is characterized in that, described backstop layer have one with the mutually not attached radial outer end of described spacer layer.

6. pad according to claim 1 is characterized in that, described sealing edge protrudes mutually relatively.

7. pad according to claim 6 is characterized in that, described backstop layer is provided with a flange, and the flange sleeve on this flange and the described spacer layer is connected together.

8. pad according to claim 1 is characterized in that, described sealing edge protrudes mutually dorsad.

9. pad according to claim 8 is characterized in that, described backstop layer is the plane.

10. pad according to claim 1 is characterized in that, described sealing edge protrusion direction is identical.

11. pad according to claim 1 is characterized in that, described backstop layer is the plane.

12. pad according to claim 1 is characterized in that, described backstop layer is radially inwardly crossed described sealing edge with stretching out.

13. pad according to claim 1 is characterized in that, described backstop layer is fixed at least one the described spacer layer that is positioned at the sealing edge radial outside.

14. pad according to claim 1 is characterized in that, described backstop layer is fixed on its radial outer end.

15. pad according to claim 1 is characterized in that, described backstop layer have one with the mutually not attached radial inner end of described spacer layer.

16. assembly parts comprise:

An engine block, it has a casing bore that matches with cylinder buss at least;

A cylinder head;

A pad, it is between described engine block and the cylinder head, pad has basic first and second spacer layers on plane that are at least, and the casing bore that is provided with at least one and the described engine block is corresponding to mesopore, mutually have a relevant sealing edge at least on each spacer layer in relatively, the sealing edge radially outward outwards protrudes from their planes at body place separately around described hole at interval; Local backstop layer is between described spacer layer, its area is less than arbitrary described spacer layer, the position of described backstop layer from the position of described sealing edge inner radial to radially outer striden across described sealing edge fully, and be fixed on the only adjacent spacer layer of one deck at least with described sealing edge one side, and at the relative opposite side of sealing edge is free end, and described pad engages with described lining.

17. pad according to claim 16 is characterized in that, described backstop layer is fixed at least one spacer layer that is positioned at the sealing edge radially inner side.

18. pad according to claim 16 is characterized in that, described backstop layer only is fixed on the spacer layer.

19. pad according to claim 16 is characterized in that, described backstop layer is fixed on its radial inner end.

20. pad according to claim 4 is characterized in that, described backstop layer have one with the mutually not attached radial outer end of described spacer layer.

21. pad according to claim 16 is characterized in that, described sealing edge protrudes mutually relatively.

22. pad according to claim 21 is characterized in that, described backstop layer is provided with a flange, and the flange sleeve on this flange and the described spacer layer is connected together.

23. pad according to claim 16 is characterized in that, described sealing edge protrudes mutually dorsad.

24. pad according to claim 23 is characterized in that, described backstop layer is the plane.

25. pad according to claim 16 is characterized in that, described sealing edge protrusion direction is identical.

26. pad according to claim 16 is characterized in that, described backstop layer is the plane.

27. pad according to claim 16 is characterized in that, described backstop layer is radially inwardly crossed described sealing edge with stretching out.

28. pad according to claim 16 is characterized in that, described backstop layer is fixed at least one the described spacer layer that is positioned at the sealing edge radial outside.

29. pad according to claim 16 is characterized in that, described backstop layer is fixed on its radial outer end.

30. pad according to claim 19 is characterized in that, described backstop layer have one with the mutually not attached radial inner end of described spacer layer.