RU2776003C1 - Intermediate housing of the compressor of a bypass turbojet engine - Google Patents

Abstract

FIELD: turbomachinery.

SUBSTANCE: invention relates to the field of turbomachinery, namely, to structural elements of the intermediate housings of turbojet engines. The intermediate housings of the compressor of a bypass turbojet engine contains a composite conical flow separator, power racks located between the outer and inner circuits, united by a composite conical flow separator consisting of fixed and movable sectors. The fixed sectors are made in one piece with the power racks, between which the movable sectors are located, the end walls of which are connected by rotary axes to the nearby fixed sectors. The rear walls of the movable sectors are kinematically connected to the drive of the guide vanes of the high-pressure compressor by means of rotary rods, levers and drive rings. The stator part of the high-pressure compressor is connected to the fixed sectors of the flow divider, while fingers are installed on the drive ring of the movable sectors. On the rear walls of the movable sectors of the separator, inclined slots are made with the possibility of contact with the corresponding pins of the drive ring of the movable sectors. The movable sectors and the front row of guide vanes of the high-pressure compressor are kinematically connected by means of one drive ring, which contains means for attaching fingers located on its front end, as well as means for connecting to the front row of guide vanes, the latter of which are installed from the side of the rear end of the drive ring.

EFFECT: increasing reliability and reducing the weight of the structure, by reducing the number of parts while maintaining synchronization of the rotation control of the movable sectors of the conical flow separator and the guide vanes of the high-pressure compressor.

1 cl, 4 dwg

Description

The invention relates to the field of turbomachinery, namely, to structural elements of the intermediate housings of turbojet engines.

Known intermediate casing of the compressor of a bypass turbojet engine with a composite conical flow separator, containing power racks placed between the outer and inner circuits, combined with a composite conical flow separator, consisting of fixed and movable sectors, and the fixed sectors are made in one piece with the power racks, between which movable sectors are located, the end walls of which are connected by rotary axes to nearby fixed sectors, and the rear walls of the movable sectors are kinematically connected to the drive of the guide vanes of the high-pressure compressor by means of rotary rods, levers and drive rings, also the stator part of the high-pressure compressor is connected to the fixed sectors of the flow divider , while fingers are installed on the drive ring of the movable sectors, in turn, inclined slots are made on the rear walls of the movable sectors of the separator with the ability to contact in accordance the missing fingers of the drive ring of the movable sectors.

/RU No. 2729558, IPC F02K 3/075, published: 08/07/2020/ - prototype.

The disadvantage of the known intermediate housing is that the mechanization of the circuit separator is implemented without interconnection with other elements for regulating the bypass ratio, namely with the adjustable compressor guide vanes used in almost all modern gas turbine engines [Agulnik A.B., Bakulev V.I., Gogubev V.A., Kravchenko I.V., Krylov B.A. Thermogasdynamic calculations and calculation of the characteristics of gas turbine engines / Pod. ed. Bakuleva V.I.: Textbook.: - M: MAI Publishing House, 2002. - 256 p.: ill. ISBN 5-7035-2539-X]. This leads to the unjustified use of additional drive elements, which increases the number of parts, complicates the synchronization of control.

The technical result achieved by using the claimed invention is to increase the reliability and reduce the weight of the structure by reducing the number of parts while maintaining synchronization of the rotation control of the movable sectors of the conical flow separator and the guide vanes of the high pressure compressor.

The specified technical result is achieved by the fact that in the intermediate housing of the compressor of a bypass turbojet engine, containing a composite conical flow separator, power racks located between the outer and inner circuits, united by a composite conical flow separator, consisting of fixed and movable sectors, and the fixed sectors are made in one the whole with power racks, between which there are movable sectors, the end walls of which are connected by rotary axes to nearby fixed sectors, and the rear walls of the movable sectors are kinematically connected to the drive of the guide vanes of the high-pressure compressor by means of rotary rods, levers and drive rings, also the stator part of the high-pressure compressor pressure is connected to the fixed sectors of the flow separator, while on the drive ring of the movable sectors there are fingers, in turn, on the rear walls of the movable sectors of the separator, inclined pins are made cutters with the ability to contact with the corresponding pins of the drive ring of the movable sectors, according to the proposal, the movable sectors and the front row of guide vanes of the high-pressure compressor are kinematically connected by means of one drive ring, containing means for fastening the fingers located on its front end, as well as means for connecting with the front row of guides devices, the last of which are installed from the side of the rear end of the drive ring.

The implementation of the kinematic connection of the movable sectors and the front row of guide vanes of the high-pressure compressor by means of one drive ring, from the front end containing the means of fastening the fingers, and from the rear end of the means of connection with the levers of the first row of rotary vanes in common, allows to reduce the number of details of the mechanization structure, which leads to reducing the weight and increasing the reliability of this design.

The essence of the claimed invention is illustrated by drawings, which show the design of the intermediate housing with an adjustable conical flow separator, combined with a common drive with guide vanes of the high pressure compressor.

In FIG. 1 is a schematic diagram of the location of the adjustable intermediate body flow divider.

In FIG. 2 shows the relative position of the movable and fixed sectors of the adjustable intermediate housing flow divider.

In FIG. 3 shows the mechanization of the drive of the adjustable flow divider of the intermediate casing and guide vanes of the high-pressure compressor.

In FIG. 4 shows the fixation of the movable sector of the adjustable intermediate body flow divider.

The intermediate housing of the compressor of a bypass turbojet engine with a composite conical flow separator, contains power racks (1) located between the outer (2) and inner (3) circuits, united by a composite conical flow separator, consisting of fixed (4) and movable (5) sectors , and the fixed sectors (4) are made in one piece with the power racks (1) between which the movable sectors (5) are located, the end walls (6) of which are connected by rotary axes (7) to the nearby fixed sectors (4), and the rear walls (8) movable sectors (5) are kinematically connected to the drive. The outer diameter of the inner circuit (3) is formed by the stator part (9) of the high-pressure compressor with adjustable guide vanes (10), also the stator part (9) of the compressor is connected to the fixed sectors (4) of the flow divider, and the drive of the guide vanes (10) of the compressor and movable sectors (5) of the separator is made common. In a particular case of implementation, the common drive consists of interconnected control hydraulic cylinder (11), rocker arm (12) and external thrust (13). Changing the position of the movable sectors (5) and nearby adjustable guide vanes (10) of one compressor stage is performed by means of a drive ring (14). The remaining guide vanes (10) of the subsequent compressor stages change their position by means of drive rings (15). The outer link (13) is connected to interconnected brackets (16) (17) connected to the corresponding pivot arms (18) (19) movably fixed on the platform (20), which in turn is fixed on the stator part of the high pressure compressor (9 ). The drive rings (14) (15) are connected to the respective pivot arms (18) (19) via rods (21) (22). Pins (23) are mounted on the front end of the drive ring (14) of the movable sectors (5) by means of connection, for example, bolted connections. Also, the drive ring (14) is provided with means of movable connection with guide vanes (10) of the first stage of the high-pressure compressor, for example, radial axes rigidly fixed on the swivel ring (14) and forming movable connections in the form of spherical hinges with the corresponding guide vanes (10) located on the side of the rear end of the drive ring (14) on the stator part of the high pressure compressor (9). In turn, on the rear walls (8) of the movable sectors (5) of the separator, inclined slots (24) are made with the ability to contact with the corresponding pins (23) of the drive ring (14) of the movable sectors (5). The rotary axes (7) are equipped with collars (25), in turn, in the end walls (6) of the movable sectors (5) there are holes (26) coaxial with the rotary axles (7) and grooves (27) for the collars (25) for fixing the rotary axes (7) by means of split spacer rings (28), which are placed in the corresponding grooves (29). The fixed sectors (4) of the flow divider are equipped with spherical bearings (30) pressed into the holes (31) and in contact with the rotary axes (7).

The change in the position of the movable sectors (5) is carried out together with the guide vanes (10) by means of the control hydraulic cylinder (11), which transmits the force through the rocker (12) to the outer rod (13), then to the interconnected brackets (16) (17), which, when moving change the position of the rotary levers (18) (19), transferring the force to the drive rings (14) (15) through the rods (21) (22), respectively. The driving ring (14) during movement acts on the movable sectors (5) by means of the fingers (23) mounted on the ring (14) that are in contact with the corresponding inclined slots (24), deflecting them relative to the rotary axes (7), and also changes the position of the guide vanes (10) the first stage of the high-pressure compressor due to the presence of a kinematic connection with them. The change in the position of the guide vanes (10) of the remaining stages of the high-pressure compressor is carried out through the drive rings (15).

Kinematic connection with the preservation of synchronization of the rotation control of the movable sectors (5) and guide vanes (10) of the first stage of the high-pressure compressor driven by one rotary ring (14) makes it possible to increase reliability and reduce weight by reducing the number of structural parts.

Claims (1)

Intermediate housing of the compressor of a bypass turbojet engine, containing a composite conical flow separator, power racks placed between the outer and inner circuits, united by a composite conical flow separator consisting of fixed and movable sectors, the fixed sectors being made in one piece with the power racks, between which are located movable sectors, the end walls of which are connected by rotary axes to nearby fixed sectors, and the rear walls of the movable sectors are kinematically connected to the drive of the high-pressure compressor guide vanes by means of rotary rods, levers and drive rings, also the stator part of the high-pressure compressor is connected to the fixed sectors of the flow separator, at the same time, fingers are installed on the drive ring of the movable sectors, in turn, inclined slots are made on the rear walls of the movable sectors of the separator with the ability to contact with the corresponding fingers of the drive ring of the movable sectors, characterized in that the movable sectors and the front row of guide vanes of the high-pressure compressor are kinematically connected by means of one drive ring containing means for fastening the fingers located on its front end, as well as means for connecting to the front row of guide vanes, the last of which are installed from the side of the rear end of the drive ring.

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