Gasket

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly, to components used for separation of stacked porous plates in production process. Circular gasket is made of carbon material whereon an adhesive coat layer is applied and incorporates opposed first and second surfaces. Note that at least one of the said surfaces has multiple radial channels each passing between the gasket inner and outer radial sides to inter-joint them. Method of preparing circular carbon fiber blanks for chemical filtration in vapor phase consists in stacking the aforesaid carbon fiber blanks. Between every two circular blanks, a circular metal screen cushion is laid so as to make stacked circular blanks and circular gaskets form interfaces of internal space inside a stack. Every aforesaid circular gasket comprises adhesive coat layer applied thereon to prevent sticking of circular carbon blanks. Method of producing one-piece circular carbon-material gasket consists in forming one-piece circular carbon-material gasket with opposed first and second surfaces and radial channel and applying adhesive coat layer on the said circular gasket.

EFFECT: updating production process.

22 cl, 11 dwg

 

The technical field to which the invention relates.

The present invention relates to spacers used to separate stacked in a pile porous plates in the manufacturing process. In particular, the invention relates to a ring carbon spacers used to separate stacked in a stack of annular workpieces of composite material, in particular in the process of sealing, for example, by chemical infiltration in the vapor phase.

Procurement of composite material can, in particular, represent a ring blanks for the manufacture of brake discs or other moving parts.

The level of technology

Device for sealing an annular blanks for the manufacture of brake discs and similar parts are described, for example, in patent application U.S. No. 10468031, filed August 14, 2003; an example of such a device is shown in figure 1.

1 very schematically shows a process chamber containing a cavity 10, which contains a set of annular blanks or plates 20 made of carbon fiber. Billets set are stacked, with their Central openings are essentially aligned in the vertical direction. A stack can consist of multiple overlaid sections separated by one or more intermediate bearing stratum of the us 12.

Stacked in the stack of plates separated from each other by separators 30. As shown in figure 2, the separator 30 may be arranged radially, and the number could be different. Dividers create between adjacent plates, the gaps 22, having essentially the same height, and provide communication between the internal volume 24 of the stack formed essentially aligned in the vertical direction of the Central openings of the plates, and external volume 26 on the outside of the stack and inside the cavity 10.

In the example shown in figure 1, in the cavity 10 contains one stack of plates. In other embodiments, the implementation in the same cavity may contain multiple stacks of plates arranged next to each other.

The cavity 10 is heated in a current collector 14, made for example of graphite, which forms the wall of the cavity 10 and the United inductive coupling with the induction coil 16 located outside of the housing 17 surrounding the current collector. Can also be used with other heating methods, such as resistive heating (Joule effect).

In the cavity 10 let the gas containing one or more carbon sources, usually hydrocarbon gases such as methane and/or propane. In the present example, the inlet gas is produced through the lower part 10A of the cavity. The gas passes through the zone 18 pre the preliminary heating, formed of one or more perforated plates located one above the other in the lower part of the cavity under the plate 11 supporting a stack of plates. Gas heated plates pre-heating (heated to a temperature that is supported in the cavity), flows freely into the cavity, passing simultaneously into the inner volume 24, external volume 26 and the gap 22. The residual gas is withdrawn from the cavity through the discharge port, provided in the cover 10b, the method of extraction.

The separators 30 are separately installable units, most often made of alumina (aluminum oxide). However, the molded blocks of alumina are extremely fragile and often break down. In practice, under normal use standard units of alumina serve not more than two or three cycles of compaction. This, naturally, leads to increase in production costs, since it necessitates frequent replacement of blocks of alumina.

In addition, by manual replacement of individual blocks of alumina, located between the layers of the workpieces takes a very long time. In the example illustrated in figure 2, shows six such blocks, but in practice can be used up to twelve units. Time costs are compounded by the fact that the handling of fragile blocks t is Eboue extreme care to avoid breakage. As a rule, preparation of equipment for full compaction process, which uses seven pallets with workpieces (each of which is from twelve to fourteen stacks of blanks), by known technologies may take from one to two working days.

Another drawback of the use of separate spacers 30 is that they can cause deformation (namely, dents) in the workpiece under the action of the weight of the blanks (and separators)formed on the workpiece. As can be seen from figure 2, between the separators 30 are large areas of the workpiece that are not based on delimiters. Since the workpiece, usually made of plastic material, and alumina, which is made from the separator 30, is not capable of deformation on the surface of the billet in the locations of the spacers 30, there are dents. These dents, no matter how small they may be, must be removed by machining on an additional processing step to provide the necessary flat surface required for moving parts. In the use of the workpiece thickness greater than the desired thickness of the finished part, to take account of possible deformations that occur during the manufacturing process by known technologies, and mechanical treatment aimed at addressing these de is Armazi. Loss of material removed during machining, reduce production efficiency.

The invention

In connection with the foregoing in accordance with the present invention serves integral or otherwise made in one piece annular gasket separating the folded stack ring blanks.

The gasket of the present invention has an essentially flat annular shape with opposing first and second surfaces. At least one of these surfaces is designed in such a way that at least partially forms a radially oriented channels for the passage of gas flows, connecting the inner space of the gasket with the surrounding space.

The gasket of the present invention preferably has a radial dimensions close to the corresponding dimension of the adjacent ring blanks. This means that the gasket preferably has an internal diameter and an external diameter close to the corresponding dimension of the ring blanks. If the dimensions of the strip are not identical to the dimensions of annular workpieces, it preferably should be somewhat smaller (i.e. have a larger internal diameter and a smaller outside diameter than the ring blanks), not more (i.e. not wider in the radial direction is the situation), than ring blanks.

In one of the embodiments of the present invention, the gasket is made of a carbon material (e.g., graphite or composite carbon-carbon material), which caused anti-adhesive coating.

Brief description of drawings

The present invention will become more clear from the following descriptions with reference to the accompanying drawings. In the drawings:

- figure 1 depicts a process chamber for sealing the folded stack of annular workpieces,

- figure 2 depicts the location of the individual separators separating stacked in the stack ring blanks of figure 1,

- figa-3C illustrate a first example of a whole strip of the present invention,

- figa-4C illustrate a second example of a whole strip of the present invention,

- figa-5C illustrate a third example of a whole strip of the present invention.

It should be emphasized that the drawings are only illustrative of the embodiments of the present invention, without any limitation in its definition. It should also be noted that the drawings are not necessarily observed scale both in General and in certain related types.

Detailed description of the invention

In General, the gasket of the present invention has a p is d especially useful features.

Integral or otherwise made in one piece gasket design facilitates loading stacked in the stack of annular workpieces in a processing chamber in comparison with the technology, in which between every two annular workpieces are laid several individual separators. As noted above, the known construction described above with reference to figure 2, requires the placement of each separator manually. In addition, since the known separators are usually made of brittle materials such as alumina, in order to prevent breakage of such separators require extremely careful handling in the course of this already lengthy and time-consuming manual operations. The separators also have a relatively small size and extremely small thickness (for example, 1×4×0.1 inch), which further complicates the work with them.

When using one-piece strip of the present invention one operation installation gasket replaces multiple installations of individual separators for known solutions. Instead of the above-described loading process chamber by a known method that takes from one to two days, when the whole strip of the present invention, the boot time under other equal conditions is greatly reduced and is from two to four hours is.

In addition, the design of the whole strip of the present invention is better suited to support the weight of one or more annular workpieces stacked above it on a larger area than in the case of individual separators, as shown in figure 2. In particular, the radial width of the one-piece ring gaskets shall be equal to or slightly less than the radial width of annular workpieces. In the result, each of the annular workpiece is less deformed after removal from the process chamber. This means that after compaction process to obtain the necessary undeformed surface requires less machining.

As mentioned above, one-piece gasket preferably has a radial width approximately the same or slightly less (for example, approximately 5 mm with respect to the outer and/or inner diameter)than the annular workpiece. If the strip had a width, which would be greater than the width of the annular workpiece on its projecting parts would be formed precipitate (e.g., pyrocarbon), resulting from the decomposition of the sealing gas, i.e. gas used in the compaction process. This can reduce the durability of gaskets or cause the need for additional processing to remove such of adca. In addition, if the gasket in a radial direction beyond the outer edge of annular workpieces, it may be difficult to place multiple stacks of annular workpieces in a processing chamber for simultaneous processing (which is often done in practice). This can negatively affect the efficiency of production and to cause the processing chamber sizes can be simultaneously processed fewer stacks.

In the General case one-piece gasket of the present invention contains radially oriented channels or other elements located on one or both sides of the strip, which at least partially form channels for the passage of gas flows connecting the inner radial direction side of the strip with its exterior in the radial direction of the party. The remark about "partial" formation of channels for the passage of gases made because in some cases, these channels also partially formed by the opposite surface of one of the annular workpiece in contact with the surface of a solid strip. The effective cross-sectional area of the channels for the passage of gas flows preferably comparable to the area of such cross-section in designs by known technologies. However, in some con the specific cases these areas may vary.

It should be borne in mind that the total cross-sectional area of the channels for the passage of gas flow can be changed, for example, by changing the dimensions of each channel, by changing the number of such channels or other similar methods. The crucial consideration here is to ensure the required level of support ring blanks or workpieces resting on the gasket.

In the General case one-piece annular gasket of the present invention should be made of a material that can withstand temperatures of approximately 1100°and in the preferred embodiment (for security) - approximately 1200-1400°C. Preferably, the selected material was the most resistant to chemical interaction with the workpiece at a specified operating temperature.

Examples of materials suitable for the manufacture of one-piece strip according to the invention include carbon materials such as graphite, composite carbon-carbon material, woven materials of graphite fiber, cast ceramics, and metal materials such as stainless steel, alloy, Inconel, titanium, molybdenum, tantalum and tungsten, but are not limited to.

On figa-3C, 4A-4C and 5A-5C illustrates the possible variations of the geometry of the whole strip of the carbon material is and according to the present invention. The material from which the strip may be, for example, composite carbon-carbon material or graphite with extremely high thermal conductivity. In the latter case can be used graphite, for example, sold under the names PGX, UCAR and MKU-S.

An annular gasket of the present invention can be made of carbon-carbon material using a two-dimensional or three-dimensional preform (which can be punctured by needles) or by laminating multiple layers of woven material of carbon fiber with subsequent sealing by the method of chemical infiltration in the vapor phase or impregnation resins.

The original carbon-carbon material may be given the desired shape using known techniques of casting and/or machining; in the case of use as source material graphite desired shape can be given to it by using a known technology machining standard blanks (blanks).

On figa depicted in terms of an annular gasket 300 according to the present invention. On fig.3b ring gasket 300 is represented in perspective. On figs ring gasket 300 is represented in vertical section on a plane perpendicular to the plane in which lies the annular gasket 300.

Annular strips is and contains 300 located on one of its sides spaced protrusions a, essentially, the correct form, alternating with recesses 304b, located between them. Similarly on the other side of the ring gasket 300 has spaced protrusions a (shown by dashed lines)is essentially correct form, alternating with recesses 302b located between them.

In the present example, the peripheries of the projections a, a overlap with the edges of the corresponding flanges on the other side of the " o " ring seal 300 (see, for example, figs). Together they enable the creation of a greater bearing area than the aforementioned individual separators 30. As a consequence, the weight stack is distributed over a larger area, allowing you to avoid concentration of the load, resulting in the use of known solutions to the emergence of a relatively strong prints in the locations of the known separators 30.

Deepening 302b, 304b limit radially oriented channels for the passage of gas flows, in which the sealing gas may leak from the space inside the stack of annular gaskets out. As indicated above, the total cross-sectional area of these channels for the passage of the sealing gas may be different depending on specific conditions. However, in the General case, the cross-sectional area usually must be CPA is a Nimes with a corresponding cross-sectional area, available when using the above-mentioned known separators 30.

On figa depicted in terms of an annular gasket 400 according to the present invention. On fig.4b ring gasket 400 is represented in perspective. On figs ring gasket 400 is represented in vertical section on a plane perpendicular to the plane in which lies the annular gasket 400.

The structure of the ring gasket 400 is similar to the structure of the annular strip 300 that both sides also contain tabs a, a, alternating with recesses 402b, 404b. In this case, deepening 402b, 404b also limit radially oriented channels for the passage of gas flows, in which the sealing gas may leak from the space inside the stack of annular gaskets out.

From figs can be seen that the structure of the " o " ring seal 300 is defined relatively flat Central layer 306 of forming the gasket material. Thus, the entire circumference of the outer edge of the annular gasket 300 may be performed even closed the line.

In contrast to this situation, since the annular strip 400 has a smaller thickness than the annular gasket 300, it does not contain a similar Central layer constituting the gasket material. Thus, the circumference of the outer edge of the annular gasket 400 (the m, for example, pigs) can only be performed by a wavy line (corresponding alternating projections and recesses).

On figa depicted in terms of an annular gasket 500 according to the present invention. On fig.5b ring gasket 500 is represented in perspective. On figs ring gasket 500 is represented in vertical section on a plane perpendicular to the plane in which lies the annular gasket 500.

The main difference between " o " ring seal 500 from the ring gasket 300 and 400 is that the tabs a, a located on opposite sides of the annular gasket 500, combined with each other, as well as the deepening 502b, 504b (see, in particular, figs). As in previously discussed embodiments, the recess 502b, 504b, at least partially, form a radially oriented channels for the passage of gas flows, in which the sealing gas can move from the space inside the stack of annular gaskets out.

In one of the embodiments of the invention the manufacture of annular spacers 500 may be implemented by creating a corresponding recess 502b, 504b on opposite sides of the workpiece from a carbon material (e.g. graphite), the original thickness of which is approximately equal to the thickness of the annular gasket 500 in locations appropriate to ejstvujuschij each other protrusions a, A.

As mentioned above, the above geometric patterns can be obtained using any of the suitable known methods, including, in particular, methods of machining and/or casting in the form of, but not limited to.

In the application of carbon materials for the manufacture of gaskets according to the present invention for use with the carbon ring blanks sometimes there is a problem with the adhesion of the strip to the workpiece after completion of the compaction process. To solve this problem is provided by coating the surface of the strip of release coating, a warning is sticking.

One example of the use of such an anti-adhesion coating comprises applying to the surface of the strip of the first layer, made of MoSi2and the second layer, applied over the first layer and made of Al2About3. These layers can be deposited using known techniques such as plasma spraying. The layer of MoSi2acts as a tie layer bonding layer Al2About3with the structure of the strip.

It should be noted that the use of gaskets made of a material based on carbon, and in particular gaskets made from graphite, provides additional benefits to the production process. In General, the presence of the stack of annular workpieces graphite gaskets increases the heat storage capacity (thermal mass) of the stack, which facilitates heating and, consequently, the seal. This feature is useful because the temperature rise of the workpiece is difficult (if known technologies in the upper and lower parts of the stack of blanks due to their greater exposure to heat sources achieved a higher level of compaction than in the Central part of the stack of blanks). In addition, thanks to the good thermal conductivity of the carbon strips may be provided with a more uniform temperature distribution across the radial width of the adjacent ring blanks.

Although the present invention has been described in accordance with presumably the most effective option for its implementation, it should be noted that this description is provided only as one possible example and that the invention can be made appropriate changes or modifications not beyond the scope of the claims attached to the present description.

1. Ring made in one piece, strip, containing the opposite one to the other of the first and second surfaces, characterized by the fact that is it made of carbon material, which caused a layer of anti-adhesive coating, and contains at least one of these surfaces multiple radially oriented channels, and each of these channels connects the inner radial direction side of the strip with its exterior in the radial direction of the party.

2. The gasket according to claim 1, characterized in that the radially oriented channels provided on the first surface and the second surface.

3. The gasket according to claim 2, characterized in that the channels provided on the first surface, essentially aligned in the circumferential direction with channels provided on the second surface.

4. The gasket according to claim 2, characterized in that the channels provided on the first surface, which is offset in the circumferential direction relative to the channels provided on the second surface.

5. The gasket according to claim 1, characterized in that the carbon material is a carbon-carbon material or solid graphite material.

6. The gasket according to claim 5, characterized in that the carbon-carbon material is a woven material made of carbon fiber.

7. The gasket according to claim 1, wherein the release coating includes a first layer made of MoSi2deposited on a carbon material, and a second layer made of Al2About 3deposited on the first layer, made of MoSi2.

8. The method of preparation of ring preparations of carbon fiber for the process of chemical infiltration in the vapor phase, whereby the annular billet of carbon fiber piled in stacks, and between every two annular workpieces is placed an annular gasket in the form of a single element of the carbon material so that the folded stack ring blanks and o-rings together form the boundary of the internal space within the stack, characterized in that each of the annular gasket has first and second surfaces opposite one another, and a multitude of radially oriented channels formed at least on one surface of the strip connecting the internal space stack space located outside of the stack, each of the annular gasket contains a deposited antiadhesive coating to prevent sticking to it ring carbon blanks.

9. The method according to claim 8, characterized in that on each of the surfaces of each annular strip, a plurality of corresponding channels.

10. The method according to claim 9, characterized in that the channels provided on the first surface, essentially combined in district n the Board with channels, provided on the second surface.

11. The method according to claim 9, characterized in that the channels provided on the first surface, which is offset in the circumferential direction relative to the channels provided on the second surface.

12. The method of claim 8, wherein the carbon material is a carbon-carbon material-based fibrous or solid carbon graphite material.

13. The method according to item 12, wherein the carbon-carbon material on the basis of the fibrous carbon is a woven material made of carbon fiber.

14. The method of claim 8, wherein the release coating includes a first layer made of MoSi2deposited on a carbon material, and a second layer made of Al2About3deposited on the first layer, made of MoSi2.

15. A method of manufacturing a one-piece annular strip of a carbon material, comprising forming a one-piece annular strip of a carbon material, which has first and second opposite surfaces and a radially oriented channel, provided that at least one of these parties, and the specified channel connects the inner radial direction side of the strip with its exterior in the radial direction side, and drawing on the ring procedualisation coverage.

16. The method according to item 15, wherein applying the adhesive coating includes applying a first layer made of MoSi2on the carbon material and apply a second layer made of Al2About3on the first layer, made of MoSi2.

17. The method according to item 16, wherein applying the adhesive coating includes the use of plasma spraying for the first layer, made of MoSi2on the carbon material and applying the second layer is made of Al2About3on the first layer, made of MoSi2.

18. The method according to item 15, wherein forming the circular strip includes machining graphite blanks.

19. The method according to item 15, wherein the carbon material is a carbon-carbon material-based fibrous or woven carbon material of the carbon fiber.

20. The method according to claim 8, characterized in that the presence of the " o " ring seal in the form of a single element made of a carbon material, between every two annular pieces of carbon fiber increases the heat storage capacity of the stack and increases the efficiency of the process chemical infiltration in the vapor phase.

21. The method of claim 8, wherein each of the annular gasket has an external d is amatr less than the external diameter of annular workpieces made of carbon fiber, and an inner diameter greater than the inner diameter of annular workpieces made of carbon fiber.

22. The method according to item 21, wherein the outer diameter of each of the sealing rings 5 mm less than the outer diameter of annular workpieces made of carbon fiber, and the inner diameter of each of the sealing rings 5 mm larger than the inner diameter of annular workpieces made of carbon fiber.



 

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Friction member // 2283973

FIELD: mechanical engineering; friction members with polymer composite friction components.

SUBSTANCE: proposed friction member has metal framework and polymer composite friction component mounted on it. Polymer composite friction component consists of layers; each layer consists of polymer matrix and filler (or fillers). Polymer composite friction component is made from at least three layers including layer located on working surface of component which is made from unhardened polymer matrix and filler (or fillers); mass ratio of polymer matrix to filler (or fillers) exceeds that of polymer matrix to filler (or fillers) in layer (or layers) of polymer composite friction component located between layer on working surface and layer which is in contact with metal framework. Layer which is in contact with metal framework has ratio of matrix to filler exceeding ratio of matrix to filler in layer (or layers) of polymer composite friction component located between layer which is contact with metal framework and layer located on working surface. Service characteristics of article are improved due to reduced vibrations because of enhanced dampening ability of laminated composite component.

EFFECT: improved service characteristics; reduced running-in time due to charging of working surface in the course of initial period of operation.

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