WOVEN CLOTH LAYER SUPPORTED LEAF SEAL

Abstract

The invention relates to the construction of a woven cloth layer (3) designed in a way that it will be placed between metal sheets (2) in order to support them in the sealing element (1) which is mounted to provide sealing around the rotating elements like high/speed rotors, blades in the various mechanisms such as gas and steam turbines, aircraft engines

Claims

1. A sealing element (1) comprising a front plate (4) prevents the flow to impact the metal sheets (2) directly and irregularly, a back plate (5) provides mechanical support to the metal sheets (2), metal sheets (2) arranged side-by-side in a row between front plate (4) and back plate (5) around rotating elements (8) in order to reduce the amount of leakage flow in the flow direction (A) between the high-pressure zone (Y) and the low-pressure zone (D) formed in the ambient during the movement of the rotating elements (8) as high-speed rotating rotor, a flap, characterized in that; it comprises a woven cloth layer (3) made of metal and/or non-metal durable fibers, woven in various forms and patterns to be placed between metal sheets (2) for dampening vibrations in metal sheets (2) during flow and reducing the amount of leakage.

2. A sealing element (1) according to claim 1, characterized in that; it comprises folded ends (2.1) in the portion of the metal sheets (2) contacting the rotating element (8) to reduce wear amount in case of any contact with rotating element (8)

3. The invention is the production method of the woven cloth layer (3) in claim 1, characterized in that; one edge of the woven cloth layer (3) is given form by crushed with a single roller (10) or through double roller (10), in such a way that it can be placed between the metal sheets (2).

Description

BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to comprehensively understand the structure of the invention and its advantages with additional elements, it is necessary to evaluate it together with the following figures.

[0017] FIG. 1; is a three-dimensional view of the sealing element of the invention.

[0018] FIG. 2; is a side view of the sealing element of the invention.

[0019] FIG. 3; is a front view of the sealing element of the invention.

[0020] FIG. 4; is a representation of closing gaps between flat sheets using the woven cloth layer in the sealing element.

[0021] FIG. 5; is a representation of the closing gaps between metal sheets with rolled ends using the woven cloth layer in the sealing element.

[0022] FIG. 6; is a detail view of metal sheets with rolled ends and the woven cloth layer placed between them.

[0023] FIG. 7; is a representation of the process of forming the woven cloth layer by means of a single roller.

[0024] FIG. 8; is a representation of the process of forming the woven cloth layer by means of a double roller.

[0025] FIG. 9; is an illustration of samples of woven patterns that can be used in production of woven cloth layer.

REFERENCE NUMBERS

[0026] 1. Sealing Element

[0027] 2. Metal Sheet [0028] 2.1. Rolled End

[0029] 3. Woven cloth layer

[0030] 4. Front Plate

[0031] 5. Back Plate

[0032] 6. Support Ring

[0033] 7. Spacer

[0034] 8. Rotating Elements

[0035] 10. Roller

[0036] A: Flow Direction

[0037] D: Low Pressure Zone

[0038] Y: High Pressure Zone

DETAILED DESCRIPTION OF THE INVENTION

[0039] In this detailed description, preferred structures of the invention of sealing element (1) are explained only for a better understanding of the subject matter and without any restrictive effect.

[0040] The invention relates primarily to the improvements in the sealing element (1) which is used in order to reduce the amount of leakage flow towards the flow direction (A) between high-pressure zones (Y) and low-pressure zones (D) formed in the ambient during the movement of rotating elements (8) such as high-speed rotors, blades, which are involved in the various mechanisms of the energy sector such as gas and steam turbines, aircraft engines. FIG. 1 shows a three-dimensional view of the related sealing element (1). According to this, sealing element (1) with its overall state, comprises; [0041] a front plate (4) located on the side of high pressure (Y) of the leakage flow, which prevents the flow to impact the metal sheets (2) directly and irregularly, [0042] a back plate (5) located on the low pressure side (D) of the leakage flow, which provides mechanical support to the metal sheets (2) while meeting the explicit force generated on the metal sheets (2) due to pressure difference, [0043] metal sheets (2) arranged side-by-side in a row between front plate (4) and back plate (5), around rotating elements (8) to prevent leakage, [0044] a woven cloth layer (3) made of metal and/or non-metal durable fibers, woven in various forms and patterns to be placed between metal sheets (2) for dampening vibrations in metal sheets (2) during flow and reducing the amount of leakage.

[0045] The front plate (4), back plate (5) and metal sheets (2) forming the sealing element (1) are connected by welding or similar binding method.

[0046] The improvement in the sealing element (1) of the invention is the construction of a woven cloth layer (3) which is placed between metal sheets (2). Said woven cloth layer (3) is a structure which can be woven in various patterns and forms from fibers produced from metal or other durable materials. FIG. 9 shows several examples of woven patterns that can be used in woven cloth layer (3). FIG. 2 shows the side view of the sealing element (1) of the invention. From FIG. 2, the construction of the metal sheets (2) and the woven cloth layer (3) arranged side by side on the rotating element (8) can be seen more clearly. FIG. 3 shows a cross section view of the sealing element (1) from the front profile. In the section in FIG. 3, the leakage direction (A) between the high-pressure zone (Y) and the low-pressure zone (D) can be seen.

[0047] The designed woven cloth layers (3) have a flexible structure in the radial direction, unlike metal sheets (2) with isotropic material properties. Through the woven cloth layers (3) placed between metal sheets (2), they are provided with the ability to damper the vibration effects. In this respect, the sealing element (1) will have a more stable structure in the radial direction.

[0048] The resistance and sealing performance of sheet metal (2) has been improved by adding woven cloth layers (3) to the sealing elements (1) consisting of metal sheets (2).

[0049] For this purpose, woven cloth layers (3),which are formed to cover the gaps opening gradually towards the outer diameter between the metal sheets (2), are designed when the metal sheets (2) are arranged in a concentric form on the surface of the rotating element (8).

[0050] The Method of Manufacturing the Woven Cloth Layer in the Sealing Element (1) of the Invention is as Follows:

[0051] First, woven cloth layers (3) will be pressed from one end with taper roller (10) on a flat surface as shown in FIG. 7, or pressed from both ends with the double roller (10) to form an angular layout as shown in FIG. 8. In the next step, metal sheets (2) in the sealing element (1), in which the design parameters were set according to the operating conditions, are manufactured. The ends of the metal sheets (2) in contact with the rotating element (8) can be manufactured in a straight or curved shape. FIG. 6 shows a detail view of the construction of folded metal sheet (2) and the interlaced woven cloth layer (3). As in FIG. 6, with this structure of metal sheet (2) containing folded end (2.1), the amount of wear on the rotation element (8) is reduced and better aerodynamic lifting force is achieved on metal sheets (2).

[0052] After the production of metal sheets (2) and woven cloth layers (3), pairs of metal sheet (2) and woven cloth layer (3) are arranged linearly and are formed to be concentric with the surface of rotating element (8) as shown in FIG. 4. Prepared woven cloth layer (3) and metal sheet (2) pairs are joined to spacer (7) by using methods like welding. The function of the spacer (7) as a part used to adjust the desired gap between sheet metal (2) can be accomplished by woven cloth layer (3). Therefore, the sealing element (1) can also be configured without using the spacer (7). The woven cloth layers (3), metal sheets (2) and spacers (7) that are joined along the linear axis are fixed to each other at both ends after being bent in the desired radius in ring form. Thus, a circular structure is created around the rotation element (8).

[0053] The production of the sealing element (1) is completed by combining the woven cloth layers (3), metal sheets (2) and spacers (7), which are arranged in the form of a complete ring, with the back plate (4), the front plate (5) and the support rings (6).

[0054] In the sealing element (1), the production of metal sheets (2) by rolling the end that is close to the rotation element (8) with a sheet metal roller machine and/or a similar equipment is also described above. FIG. 5 shows a representation of closing the gaps between the metal sheets (2) with folded ends (2.1) by using woven cloth layer (3).

[0055] The vibration-induced deformation of the metal sheets (2) has been reduced to a minimum level in the case of pressure difference due to the construction of the woven cloth layer (3) in the sealing element (1). By the means of woven cloth layer (3), the sealing element (1) has been utilized as a more stable structure without losing its elasticity in radial direction.