JPH01242875A - Composite seal assembly - Google Patents

Abstract

PURPOSE: To ensure easy attachment to an engine block by fixing a retainer insert for receiving a polymerized elastomeric seal body to a plastic retainer by ultrasonic welding or the like in a crankshaft seal assembly. CONSTITUTION: A seal assembly 10 of a rear crankshaft 22 comprises a retainer 16, a retainer insert 18, and a seal portion 20 made of polymerized elastomeric material, fixed to the mounting surface 14 of an engine block 12 by a fastening bolt 92. The seal portion 20 which has a seal lip 40 and a dirt lip 42 is attached to the retainer insert, and a garter spring 44 imposes the seal lip 40 to be radially compressed around the crankshaft 22. The retainer insert 18 and the retainer 16, which are both made from a synthetic plastic material, are engaged by ultrasonic welding in a mechanically secure, fluid-tight relation. This ensures each attachment of the seal assembly which eliminates the need to machine a counterbore in the end of the engine block.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates generally to oil seals and, more particularly, to composite seal assemblies suitable for special applications.

The present invention provides a new seal type that can eliminate cumbersome and relatively unreliable conventional designs for certain specialized applications. In particular, the seal design of the present invention makes installation of the rear crankshaft seal much easier and more reliable.

The invention has other applications, the first of which is to rear crankshaft seals. Rear crankshaft seals have historically presented many serious problems.

In engine designs, the portion of the crankshaft over which the sealing lip of the oil seal must extend may be the portion of the crankshaft where the diameter decreases. Therefore, a rope-type backing is installed around the end of such a crankshaft of decreasing diameter.
There was a time when it was common to wind the

In other applications, the seal is made of two halves that fit together; during installation, one half is inserted into a narrow recess in a portion of the engine block above the crankshaft bearing journal. Not only did it have to be placed in-house, but the lower half had to be precisely assembled to the upper half to avoid leakage along the joint surfaces of both halves.

Additionally, it was often difficult to align the seal and place the seal lip in a single plane to provide an effective seal.

In many cases, these problems got worse.

This is because the materials used to form the sealing lip lack mechanical strength and toughness. For example, silicone rubber was often used for this purpose. Although this provided a good seal between the seal halves, the material lacked toughness and could break during installation.

Another problem is that it is not only applicable to the rear crank;
This is also common for application to general sealing equipment. This problem is a quality control issue under the condition that some parts of the seal assembly are manufactured by a single manufacturer and other parts are manufactured by multiple other manufacturers.

This situation may be further exacerbated if installation is performed by assembly line personnel, who become yet another element in the assembly process.

Modern quality assurance concepts require that responsibility for assembled machine elements be placed as much as possible in a single source or source.

Therefore, in any arrangement in which the different elements of the assembled parts come from different sources or are assembled by different personnel, it is important to maintain quality and to point out responsibility in the event of failure. A difficult situation arises.

The present invention provides a seal assembly that does not require machining a counterbore into the end of the engine block.

Therefore, this work can be eliminated.

The present invention provides a composite seal assembly that ensures easy alignment and easy attachment to a flat surface of the engine block or related parts thereof.

Additionally, the present invention provides low cost synthetic plastic materials (a
5ynthetic plastic material
Al) can be manufactured to precise tolerances; alternatively, polymeric elastomer seals (a elast
To provide a holder capable of receiving and precisely arranging a holder inserter holding an omeric 5ealbody.

The invention is particularly compatible with modern manufacturing techniques and also has a number of attendant advantages.

The present invention, in its preferred form, comprises a molded plastic retainer having a fastener insert received therein, and further provides a fluid-tight connection to the retainer, such as by ultrasonic welding. The attachment provides a crankshaft seal assembly with a peripheral surface for receiving and positioning a retainer insert.

The retainer insert is made of a fluoroelastomer that directly engages the surface of the portion of the crankshaft to be sealed or a similar surface.
Or maintain a high temperature resistant seal body with similar toughness.

Further, according to the present invention, the retainer itself is engaged in a fluid-tight static relationship with the engine oil pan, in addition to the mounting portion, with the portion surrounding the rear crankshaft extension. has an outer surface adapted to be This further simplifies installation and improves reliability.

The present invention provides these and numerous other advantages, including the advantage of a small volume polymeric elastomer seal that can be utilized in this installation.

In view of the failure of the prior art to provide a fully satisfactory, economical and reliable crankshaft seal, it is an object of the present invention to provide an improved composite seal assembly.

Another object of the present invention is to provide a composite seal assembly that includes three separate elements that are combined by the manufacturer into a single, easy-to-install seal assembly.

Still other objects of the invention include a retainer molded from a plastics material, a retainer insert mounted in fluid-tight relationship in a central opening within the retainer, and one or more of the retainer inserts. A composite seal assembly includes a seal portion of a polymeric elastomer adhered to a selected surface of the material and engaged with a movable mechanical portion extending through the central opening.

Yet another object of the present invention is that its components are manufactured using high volume molding techniques.
An object of the present invention is to provide a composite seal assembly that can be manufactured with minimal machining costs and at low cost using echnfques.

Yet another object of the invention is to provide a multi-component seal whose components can be assembled under the control of a single manufacturer.

Still another object of the invention is that a portion of the assembly surrounds a relatively movable mechanical member so that it can be easily aligned and positioned with respect to a fixed mechanical member and in a predetermined position of use without damage. An object of the present invention is to provide a composite seal assembly that can be reliably installed.

Another object of the present invention is to provide a seal assembly that includes a movable mechanical element and a pair of fixed mechanical elements that can be easily assembled with other parts in a fluid-tight relationship.

Another object of the invention is to provide a seal assembly in which one of the components can be attached in precise relationship to another component by ultrasonic welding techniques.

Yet another object of the invention is that the two parts of the component are formed from different thermoplastic injection molded materials;
It is an object of the present invention to provide a composite seal assembly in which a component is easily inserted, molded and bonded to a seal body made of a polymeric elastic material.

Yet another object of the invention is to provide a composite assembly comprising at least one stationary part and at least one movable mechanical part, and comprising a pair of relatively hard plastic elements and a sealing part of polymeric elastomer glued together. An object of the present invention is to provide a method of manufacturing an improved seal for providing a seal mechanism in which a fluid is confined by a seal body.

It is another object of the invention to provide a multi-element seal that resists damage during installation and fatigue during use, and ensures proper relative alignment and positioning for both fixed and movable elements. It is to be.

Yet another object of the present invention is to provide a seal assembly that eliminates the need for certain finishing operations on the remainder of the seal.

The foregoing and other objects and advantages of the present invention reside in practice in that the retainer is adapted to be mounted in fluid-tight relation to a mechanical member and that the retainer is in a desired position of use both radially and axially. a retainer insert located within the central opening, the retainer comprising a central opening having means for receiving the retainer insert; The inserter is
a seal of polymeric elastomer adhered to a portion thereof in fluid-tight relationship, the seal comprising intersecting frusto-conical surfaces defining a sealing zone along a generally circular trajectory; and whose surfaces form a contact sealing zone with a relatively movable mechanical element extending outwardly from the retainer.

The present invention also relates in practice by providing an assembly having a retainer and retainer inserter made of synthetic plastic material, and by providing a method and apparatus for manufacturing a seal assembly as such. achieved.

The precise manner in which the above and other objects and advantages of the invention are achieved in practice, reference is made to the following detailed description of preferred embodiments of the invention, given by way of example and illustrated in the accompanying drawings. It will become clearer in time. In addition,
In the drawings, the same reference numerals indicate corresponding parts.

(Left below) (Example) Although the composite seal assembly of the present invention can be used in many environments and is adaptable to many applications, in the example, two different types of seals are used. The assembly will be explained in detail.

The descriptions of both seal assemblies are slightly different from each other, and both are intended for use as rear crankshaft seal assemblies in automotive engine applications.

Turning now to more detailed drawings, FIG. 1 is a perspective view of a composite seal assembly, indicated generally at 10.

The seal assembly 10 is shown positioned proximate a mounting surface 14 that is part of the first mechanical element 12 and is adapted to be assembled in use.

The seal assembly 10 includes three major components. These components include a cage 16, a cage inserter 18
, and a sealing part made of a polymeric elastic material (an elast
meric sealing unit) 20 and is shown in FIGS. 1 to 3.

In this embodiment, the first mechanical element 12 is an engine block of an automobile, and the mounting surface 14 forms the rear end surface of the engine block 12.

The rear crankshaft extension 22 (see FIG. 2) forms a second mechanical element and is connected to the seal assembly 1.
0 through a central opening 24.

Engine oil pan 26 forms the third mechanical element. The engine oil pan 26 has an engagement surface 28 that partially engages the cylindrical lower outer surface 30 of the retainer 16, as shown in phantom.

The crankshaft extension 22 has a cylindrical surface 32, on which a portion of the seal 20 slides in a fluid-free manner.

The seal portion 20 itself has the same structure as the conventional structure in the following points.

That is, the seal portion 20 includes a seal body 34 made of a polymeric elastic material having an air-side surface portion 36 and an oil-side surface portion 38, and both surface portions 36 and 38 are generally frustoconical surfaces. and these surfaces 36, 38 meet each other along a generally circular trajectory to form a sealing lip 40. This is the part where the cylindrical surface 32 engages with a so-called dynamic seal, that is, a seal between relatively movable elements.

The seal body 34 may optionally include a dirt lip 42, which may be of conventional construction known to those skilled in the art.

A garter spring 44 is received within 146 (see FIG. 3) for applying a radial compressive load to the sealing lip 40.

The sealing body 34 also has a pair of annular adhesive surfaces 48.50.
, which are spaced apart from the sealing lip 40. The sealing lip 40 is attached to the adhesive surface 4
8.50 and attached to the retainer insert 18.

The retainer insert 18 itself is also generally annular and includes a body portion 52 having an axial flange 54, a radially inwardly facing seal body mounting flange 56, and a radially outwardly facing locating flange 58. Equipped with.

The axial flange 54 and the positioning flange 58 each have a surface 60.62. The surface 60.62 is
It is adapted to engage an opposing mating surface of the retainer 16 in a mechanically sound, fluid-tight relationship.

As will be explained in more detail below, the retainer insert 18 is made of synthetic plastic material (a synthetic plastic material).
It is preferably formed from c plastic material).

Now, referring to the cage 16, the cage includes a main body 64, which is also made of thermoplastic material.
Preferably, it is formed from. The retainer 16 is connected from a functional shank.
5hankpart) may be considered to have a mounting portion, generally indicated at 66, and an inserter receiving portion 68.

The body portion 64 includes an axial flange 70 having a radially inwardly directed cylindrical surface 72 for engaging a surface 60 of the axial flange 54 of the retainer insert 18 . The axial flange 70 is also provided with an end surface (shoulder surface) 74 that engages a surface 62 of the radial flange 58 of the retainer inserter 18 .

In use, the pair of adjacent surfaces 72, 74 form a fluid-tight joint when the seal assembly 10 is in the assembled state.

The body portion 64 of the retainer 16 further includes a radially inwardly extending protective flange 76 terminating in three or more independent tub units 78 . This protective flange 76 is connected to the seal portion 20.
It is located on the axially inner side of, that is, on the side of the sealed area or on the right side in FIGS. 2 and 3.

Now, the mounting portion 66 of the seal assembly 10 will be described. The mounting portion 66 includes a mounting body 80. As shown in FIG.

The mounting body 80 is mounted on the mounting surface (rear end surface) of the crankcase.
It has a flat end surface 82 adapted to abut 14 .

Gaskera I-G (3rd
(see figure) may be provided. The mounting body 80 also includes a plurality of tightening bosses 83 formed at intervals,
Each tightening boss 83 has an opening 84 extending in the axial direction.

The aperture 84 snugly receives a metal sleeve 86. The preferred shape of metal sleeve 86 has a radial flange 88 that engages a lower surface 90 of the head of a fastener (tightening bolt) 92 that extends through a central opening within metal sleeve 86 . This engagement causes the tightening bolt 92 to lock into the metal sleeve 86 extending between the mounting surface 14 of the engine block 12 and the lower surface 90 of the head.
bottom out'''.

As shown in FIG.
Preferably, a peripheral reinforcing wall shown at 4 is provided. The peripheral reinforcing wall 94 includes an upper wall 95 and a pair of side stub walls 97.
and a semicircular lower wall 99. A plurality of independent reinforcing webs 96 are also provided between the tightening boss 83 portion and the axial flange 70 or top wall 95 and between the
5 and the flange 70.

The side stub walls 97, 97 are each generally 98
and 100, each of which includes a vertically extending passageway 102, 104, as shown in FIG. The passages 102, 104 receive fastening members extending through openings 106, 108, respectively, in the engine oil pan 26.

In this regard, and referring again to FIG. 1, - once the retainer 16 is bolted snugly to the crankcase, the oil pan is then attached to the lower surface of the crankcase in a conventional manner. Not only can other fasteners be attached to the openings 106, 102, 1
00,108 to securely tighten the above-mentioned parts.

In this embodiment, as shown, the passageways 102 and 104
A cap nut or other fastener may be provided, or a tapped insert may be used.

FIG. 1 also shows that a plurality of webs 112 extend between the lower surface of axial flange 70 and semicircular lower wall 99 of retainer 16. FIG.

These webs, walls and bosses provide a rigid structure with minimal weight and allow for high volume manufacturing using relatively simple molds.
does not contradict re).

Referring now to FIG. 5, the seal assembly 10 is shown installed. Here, the fastener 92
extends through the tightening boss 83, and the crankcase mounting surface 14 and retainer end surface 82 are shown in abutting relationship, respectively.

For clarity of the embodiment, gasket G is not shown. In FIG. 5, one of a pair of fasteners 110 is shown that extends vertically and connects the engine oil pan 2.
6 is held on the side stub wall 97 of the retainer 16.

Referring now to FIG. 6, a slightly modified form of the seal assembly 10A is shown. In FIG. 6, the seal assembly 10A has a retainer 16A that is similar to the retainer 16 of FIG.
It is the same as that shown in FIGS. 1 to 3, except for a few differences.

In the configuration shown in FIG. 6, the upper wall 95A is continuous and extends radially outwardly of the various tightening bosses 83A throughout.

Additional reinforcing webs 96A extend between the pairs of side stub walls 97A. Additionally, the semicircular lower wall 99A does not abut the side stub wall 97A at right angles, but has a rounded transition section at its upper end.
5sections) with 101 A. This eliminates the need for auxiliary or vertical fasteners or openings to install engine oil pan 26A.

In this regard, the engagement surface 28A of the engine oil pan 26A is contoured to create a flared transition 27.
A, which is combined with the transition portion 101A at the outer end of the lower wall 99A.

In the illustrated example, a groove 29A is provided in the engagement surface 28A that mates with the oil pan and receives a gasket 31A between said engagement surface 28A and the lower outer surface 3.
Seal the interface between 0A and 0A.

FIG. 7 shows the seal assembly 10 installed in the use position.
A shows the relationship between the engine block 12A1 abutting surfaces (mounting surfaces, end surfaces) 14A, 82A, the retainer 16A, and the gasket G.

Fastener 92A is shown in phantom. For example, retainer 16
Similar to the axial flange 70A of A and the positioning flange 58A of the retainer inserter 18A, the engine oil pan 2
6A and its engagement surface 28A portion, which engages the lower outer surface 30A of the lower wall 99A of the retainer 16A.

Referring now to FIG. 4, there is shown a step in the manufacturing operation of a composite seal assembly that precedes the assembly step shown in FIG.

In FIG. 4, the retainer insert 18 is shown disposed within a mold 200, and the mold 200 has three main elements: a lower mold plate 202, a central core 201, and an upper insert. A child 206 is shown.

In this form of the invention, the retainer insert 18 is molded from a plastics material by injection molding in a mold having a suitably shaped cavity so that the axial flange 5
4, a body portion 52 is formed having a mounting flange 56 and a locating flange 58.

After molding of the inserter 18, the outer surface of the mounting flange 56 is degreased and grit blasted to give it a slightly rough finish. Alternatively, the roughness of the outer surface may be imparted by chemical etching or by providing a roughened surface in selected parts of the mold interior.

In either case, the surface ¥ = wI (preparat
ion), an adhesive of the type known to those skilled in the art (
an adhesive) is applied and dried.

The body portion 52 of the retainer insert is then placed into the mold 200, as shown, and the rubber passes through the passageway 208 into the cavity formed by the inner surfaces of the mold sections 202, 204 and 206. injected into the body.

Suitable shaping of the seal body 34, its initial curing and adhesion to the mounting flange 56 is accomplished in a manner known to those skilled in the art, which methods do not form part of this invention, which is inherently novel, and are hereby incorporated by reference. A detailed explanation will not be given here.

The seal body 34 is made of a fluoropolymer elastic material (a
fluoroelastomer material)
After opening the mold shown in FIG. 4 and removing seal body 34, the composite seal comprising resilient seal portion 20 and retainer insert 18 will be formed at a After-cure using high temperature
ed> is applied for 10 hours. This forms a completed and hardened semi-finished product as shown in FIG.

Now, referring to FIG. 3, the cage I6 and the cage inserter 1
The alignment and positioning of 8 is illustrated.

When these parts 16,18 are aligned and moved as shown in FIG. 3 and assembled, the pairs of surfaces 60 and cylindrical surfaces 72 and surfaces 62 and end surfaces 74 are snugly engaged. This allows relative centering of the cage inserter 18 with respect to the cage 16 and ensures proper axial positioning of the cage inserter 18.

Furthermore, both parts 16 and 18 are assembled using the well-known ultrasonic welding technique.
adhesion may be carried out with or without the aid of an auxiliary adhesive or similar material. Also, if appropriate, this bonding may be done with adhesive alone.

Upon completion of the molding and assembly operations, a seal assembly, such as that shown in FIG. 2, is formed, which is suitable for shipment to a manufacturer.

As explained above, installation of the above seal assembly requires almost no skill, and the mechanical parts in question, i.e., the engine block, crankcase oil pan, etc., can be finished or machined (p. .

st finish B or machining
) is not necessary to add.

The retainer 16 is positioned as shown in FIG. 1 with the gasket G disposed between the mounting surface 14 of the engine block and the front (axially inner) end surface 82 of the retainer 16. may be done.

In one embodiment of the invention, the gasket G is manufactured separately, but may also be adhered to the retainer 16 surface at the seal assembly manufacturing facility. Further, the other surface of the gasket G may be protected by covering it with release paper R for shipping, as shown in FIG. 3, for example. This coated outer surface also has
A self-adhesive material may or may not be applied. In this case, the seal assembly itself would include a gasket and gasket adhesive, thus improving the surface preparation of the block.
n) is required.

Alignment and tightening of the tightening bolts 92, etc., ensures proper alignment of the seal assembly relative to the rear crankshaft extension. Meanwhile, the tab unit 78 of the protective flange 76 limits the radial excursion of the sealing part 20 to ensure that it will not be damaged during installation.

The lower outer surface 30 of the lower wall 99 mates in fluid-tight relationship with the engagement surface 28 of the oil pan 26, which is conventionally sealed by a portion of an oil pan gasket.

Because the retainer 16 is rigid throughout, relatively large static sealing forces can be applied to the seal assembly 10 without deleterious effects. Incidentally, if this force is applied to the outer case of a conventional oil seal, there is a risk that the outer case may be deformed or other equipment may be damaged.

According to the present invention, installation of the seal assembly is greatly simplified and reliability is greatly improved.

According to the invention, thermoplastic materials are preferably used for the manufacture of the parts of the cage and cage insert. Both parts may be made from the same material, or they may be different materials. While many different materials are suitable, glass-filled nylon
filled thermoplastic resins such as ylon and other polyamide resins.
esins) is suitable. polycarbonate (polycarbonate)
carbona tes) and acetal
High temperature resistant thermoplastic materials (high
temperature resistant the
rmoplastics) can also be used.

Nitrile (nitrile) is used to manufacture the seal portion 20.
s), carboxylate nitrile (carboxy
late n1triles) and silicone polymer elastomers
) Ordinary polymeric elastic materials (e las tom
While fluoropolymer elastomers can be used, the present invention uses fluoropolymer elastomeric materials (fluoropolymer elastomers) that withstand very high temperatures.
oroelastomer materials) can be advantageously used. For this reason, the seal assembly described above, when in use, allows the fluid temperature to reach a steady 250"F, and sometimes 40"F.
It can be used effectively even when temperatures reach from 00°F to 500°F.

Using ultrasonic welding techniques is an economical method to form a strong secondary or static seal between the retainer and retainer insert. This eliminates a potential prior art problem of secondary sealing, ie failure of the seal between the exterior of the seal case and the main bearing web or similar component of the crankcase structure.

Another important feature of the invention is the press fit.
This means that proper alignment can be achieved without any fitting. The use of a bolt mold on an external flat surface not only eliminates this possibility of misalignment, but also allows for visual inspection to verify proper engagement. This may be difficult or impossible with conventional seals.

It will therefore be seen that the invention provides numerous advantages and features, including those described above and essential to the invention.

For the preferred embodiment of the invention described by way of example, it is understood that changes may be made in the precise form of the seal and the materials used therein without departing from the spirit of the invention or the scope of the appended claims. The parties will understand.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a state in which a composite seal assembly according to the present invention is used as a rear crankshaft seal,
Related engine crankcase and crankcase
The oil pan is shown in phantom lines. FIG. 2 is a longitudinal cross-sectional view of a portion of a composite oil seal assembly according to the present invention in use, showing fixed and movable mechanical elements with which the seal assembly forms a seal; ing. FIG. 3 is an exploded view showing an exploded state of each element of FIG. 2 before assembly. FIG. 4 is a longitudinal cross-sectional view partially schematically showing a method for manufacturing a cage inserter and a seal portion of an elastic polymeric material according to the present invention. FIG. 5 is a side view of a seal assembly according to the present invention in conjunction with other parts of the seal mechanism. FIG. 6 is a perspective view showing a modification of the composite seal assembly according to the present invention. FIG. 7 is a side view showing the composite seal assembly according to the present invention in a used and installed state. 10, IOA... composite seal assembly, 12, 12A.
...Engine block (first mechanical element), 14...
・Mounting surface (rear end surface of engine block), 16.16
A... Cage, 18.18A... Cage inserter, 2
0... Seal portion, 22... Rear crankshaft extension (second mechanical element), 24... Center opening, 26° 26
A...Engine oil pan (third mechanical element),
28.28A...Engagement surface, 30.30A...Lower outer surface, 32...Cylindrical surface, 34...Seal body, 36.
...Air side surface portion, 38...Oil side surface portion, 40...
Seal lip, 42... Garter lip, 44... Garter spring, 48.50... Annular adhesive surface, 52...
Main body part, 54... Axial flange, 56... Mounting flange, 58.58A... Positioning flange, 60
．． 62... Surface, 66... Mounting part, 68... Inserter receiving part, 70.70A... Axial flange, 72...
...Cylindrical surface, 74...End face (peripheral surface), 76...
Protection flange, 78...Tab unit, 80...Mounting body, 82.82A...End face, 83.83A...
Tightening boss, 84... opening, 86... metal sleeve,
92... Tightening bolt (fastener), 94... Surrounding reinforcement wall, 95.95A... Upper wall, 96° 96A... Reinforcement web, 97.97A... Side stub wall, 99.9
9A... Lower wall, l0IA... Transition part, 102.1
04... Passage, 10.6, 108... Opening, 110
... Fastener, 112 ... Web, 200 ... Mold, G ... Gasket Applicant: Chicago Rawhide Manufacturing Company

Claims (24)

[Claims] (1) A composite seal assembly comprising a retainer, a retainer inserter, and a seal portion made of an elastic polymer material, the retainer including an inserter attaching portion, the inserter attaching portion being ,
a radially inwardly directed annular surface forming a central opening for receiving and radially positioning a portion of the retainer inserter and engaging and axially positioning another portion of the retainer inserter; the retainer also has a generally flat surface for positioning the retainer in opposed relation to an associated mechanical part clamping thereto in use. and means for forming a plurality of apertures for receiving and positioning retainer fasteners, the retainer inserter having an annular surface and a shoulder surface of the retainer, respectively. axially and radially extending annular flanges for cooperative engagement and includes an annular bonding surface, the sealing portion comprising a bonding portion and a sealing body, the sealing body generally having generally frusto-conical oil side and air side surface portions meeting each other along a circular trajectory and in contact with a surface of a relatively rotating mechanical portion extending axially through the seal body; the adhesive portion is attached in fluid-tight sealing engagement to the adhesive surface of the retainer insert, and the retainer and the retainer insert are each made of a resin-containing synthetic plastic. and wherein the seal assembly is, in use, attached to an end face of a mechanical part having the relatively movable mechanical part, with the relatively movable mechanical part extending from the seal assembly and the seal of the polymeric elastomeric material. A device that is threaded so as to be engaged by the parts. 2. The composite seal assembly of claim 1, wherein the retainer mounting portion includes a plurality of metal guide inserts each received within an opening for the retainer fastener. An inserter is dimensioned to engage the retainer fastener and absorb at least a portion of the axial clamping load, such that all of the axial clamping load is transferred to the retainer fastener. It is made so that it cannot be transmitted to the mounting part. 3. The composite seal assembly of claim 1, wherein the adhesive portion of the retainer insert comprises an annular generally radially inwardly extending flange. 4. The composite seal assembly of claim 1, wherein the retainer and retainer insert are made from different thermoplastic materials. 5. The composite seal assembly of claim 1, wherein the retainer and retainer insert are made of substantially the same plastic material. (6) The composite seal assembly according to claim (1), wherein the mounting portion of the retainer is arranged such that the opening for the retainer fastener is located on the centerline of the central opening in the retainer. something that is assembled and placed in. (7) The composite seal assembly according to claim (1), wherein the retainer inserter is attached to the retainer by adhesive formed by ultrasonic welding. (8) The composite seal assembly according to claim (1), wherein the polymeric elastic seal portion is made of a fluoropolymer elastic material. 9. The composite seal assembly of claim 1, wherein the retainer further comprises a generally radially inwardly extending flange, the flange extending radially inwardly of the inserter mounting portion. those located axially inward of the annular surface and the annular shoulder surface. (10) The composite seal assembly of claim (9), wherein the radially inwardly extending flange includes a plurality of radially inwardly extending ears, the ears being circumferentially spaced apart from each other. and adapted to engage the relatively movable mechanical portion extending through the seal assembly for positioning the seal assembly during installation. (11) A composite seal assembly for retaining fluid within a cavity formed at least in part by first, second, and third relatively movable mechanical parts, the first mechanical part comprising: a retainer having one part adapted to be attached to the second mechanical part and another part adapted to be positioned around the axis of rotation of the second mechanical part; a retainer insert that is at least partially disposed and retained within another portion of the retainer surrounding an axis of rotation; a generally annular seal body having generally frustoconical oil side and air side surface portions that meet each other along a circular trajectory; The sealing portion also has an annular adhesive portion spaced from the sealing zone and having at least one surface attached in fluid-tight relation to the retainer insert, the retainer and the retainer insert being attached to the retainer insert. , made of a relatively hard and substantially fluid-impermeable synthetic plastic material, said one portion of said retainer also being positioned in a fluid-tight relationship with a mating mounting surface of said first mechanical part. the other portion of the retainer is radially outwardly oriented formed on a portion of its exterior so as to engage the third mechanical portion in a fluid-tight relationship; a static sealing surface, the one portion of the retainer further having a plurality of moving fasteners to facilitate positioning of the seal assembly relative to the first mechanical part; Something that includes the means to accept it as possible. (12) The composite seal assembly of claim (11), wherein the means for receiving a plurality of fasteners each comprises a plurality of bosses having a central opening, each opening comprising:
having a metal guide insert received within this opening. 13. The composite seal assembly of claim 11, wherein the retainer and retainer insert are made from the same plastic material. 14. The composite seal assembly of claim 11, wherein the retainer and retainer insert are made from different plastic materials. (15) The composite seal assembly according to claim (11), wherein the end face portion of the retainer and the means for receiving the fastener are both located on the centerline of the retainer. (16) The composite seal assembly according to claim (11), wherein the seal portion is made of a fluoropolymer elastic material. (17) first and third mechanical parts; a second mechanical part movable relative to the first and third mechanical parts;
a composite seal assembly for retaining fluid within a cavity at least partially formed by second and third mechanical parts, the composite seal assembly comprising: a holder having one part attached to a first mechanical part and another part arranged to surround the second mechanical part, and within the other part of the holder surrounding the second mechanical part; a retainer inserter at least partially disposed and retained and generally meeting each other along a generally circular axis trajectory to form a primary seal zone contact area on a portion of said second mechanical part; a sealing portion of polymeric elastomer material with a generally annular sealing body having frustoconical oil side and air side surface portions, said sealing portion also being spaced apart from said sealing zone; , an annular adhesive having at least one surface attached in fluid-tight relationship to the retainer insert, the retainer element and the retainer insert being relatively rigid and substantially fluid permeable; the one portion of the retainer is also formed on an end surface that is mounted in fluid-tight relationship with a mating mounting surface of the first mechanical part and a portion of its exterior; a radially outwardly directed static sealing surface, the other portion of the retainer being formed on an exterior portion thereof and engaging the third mechanical portion in a fluid-tight relationship. with static sealing surfaces directed radially outward. (18) The composite seal assembly of claim (17), wherein the retainer is attached to the first mechanical part by a movable fastener, and the one portion of the retainer element further comprises: and means for movably receiving a plurality of said fasteners to facilitate positioning of said seal assembly relative to a first mechanical part. 19. The composite seal assembly of claim 17, wherein the retainer and retainer insert are made from the same plastic material. 20. The composite seal assembly of claim 17, wherein the retainer and retainer insert are made from different plastic materials. (21) The composite seal assembly according to claim (17), wherein the polymeric elastic seal body is made of a fluoropolymer elastic material. (22) A method for manufacturing a composite seal assembly, comprising: molding a retainer inserter having an insert portion with an annular flange extending axially and radially from a thermoplastic material; and a surface of the radially extending flange. treating at least a portion of the retainer insert to provide a rough texture; and positioning the retainer insert relative to the seal mold to place the flange with the rough texture surface within the cavity of the seal mold. The generally annular seal body, which includes generally frustoconical air side and oil side surface portions that meet each other along a generally circular trajectory, is provided with a hardenable, free-flowing, high-flowing material. forming a primary sealing zone in contact with the surface of the associated moving mechanical part; curing said polymeric elastomer material and applying a portion of said material to said retainer insert; a retainer is formed from a synthetic plastic material, the retainer having an inserter mounting portion having a radially inwardly facing annular surface, the retainer having an inserter mounting portion having a radially inwardly facing annular surface; a surface defines a central opening for receiving and radially positioning a portion of the retainer insert, the retainer also engaging and axially positioning another portion of the retainer insert; at least one annular surface for positioning, the retainer also having a retainer mount, the retainer mount being positioned in opposed relation to the associated mechanical part to which the retainer is tightened in use. the retainer having a generally planar surface for receiving and locating a retainer mounting fastener, the retainer element having a radially inward annular surface and an annular shoulder surface; disposing at least a portion of the retainer insert within the central opening so as to engage a portion of the retainer insert; and forming a fluid-tight seal between the retainer and the retainer insert. One that includes each step of adhering to each other by engagement. (23) The method of manufacturing a composite seal assembly according to claim (22), wherein the bonding involves ultrasonically welding the retainer to the retainer inserter without using an adhesive. (24) The method of manufacturing a composite seal assembly according to claim (22), wherein the adhering step includes applying an adhesive to selected surfaces of at least one of the retainer and the retainer inserter. thing.