RU2635125C1 - Propulsion unit box (pub) of turbojet engine (tje), pub body, main bevel gear (mbg) of pub, driving wheel of pub mbg, driven wheel of pub mbg, pub intake shaft - Google Patents

Abstract

FIELD: engine devices and pumps.

SUBSTANCE: propulsion units box TJE PUB contains a body and a cover, made with a stepped flat bottom and cylindrical walls of variable curvature. The PUB body is saddle-shapedly placed on the intermediate engine body. The body of the PUB is made with openings for mounting of CS, PP, RRP and flexible shaft assembly for transferring the torque to the GCA units. The PUB cover is made with openings for mounting "MA", "HP" and "NF" on them. The torque input gearbox in PUB is made containing a main MBG conical gear pair of orthogonally oriented conical driving and driven gears, which is performed with a gear ratio i_v.p.=(0.7140.÷99). In the side wall of the PUB body an opening is made for inputting the torque through the spring connecting the driving wheel of the main gear conical pair of PUB with the driven conical wheel of the CCU. The input shaft of PUB is designed to combine the function of driven wheel shaft of the main PUB gear pair and the function of the toothed cylindrical wheel shaft that is integral with it. Aggregates gearboxes are communicated on the torque with a cylindrical gear wheel with the formation of drive gearboxes branched into two groups with the declared ranges ratio of the gear pairs gear ratios. The driving wheel of the main pair is located on the shaft installed in the ball and roller bearings. The reciprocating driven wheel is mounted on the input shaft of PUB on a bearing-thrust ball and supporting roller bearing. The teeth of conical crowns of driving and driven wheels are made of variable height, decreasing towards the axial vertex of the conventional addendum cone. Angle α of r.c.g. slope of conventional reference cone generator of gear rim to the axis of wheel shaft is determined in the range α_r.c.g.1=(0.59÷0.85) [rad] for the driving wheel and α_r.c.g.2=(0.74÷1.04) [rad] for the driven wheel. Angle of spiral β_W, expressed in the same projection as the angle between the tangent to the tooth line to the midpoint of the latter and the radius of the same point, drawn from the axis of the wheel shaft, is variably determined in the range of values β_W= (0.21÷0.32) [rad].

EFFECT: increase in efficiency and more than double the increase in engine life.

16 cl, 5 dwg

Description

The group of inventions relates to the field of aircraft engine manufacturing, and in particular to torque transmission mechanisms for twin-shaft, dual-circuit aircraft turbojet engines.

Known drive unit boxes for locating the drive unit and transmitting torque to them from the engine rotor, including to the shaft of the drive unit of the engine units, including the main bevel gear, which is a gear pair of orthogonally oriented bevel gears and driven gears for power take-off from the shaft rotor motor. (NN Sirotin, A.S. Novikov, A.G. Paykin, A.N. Sirotin. Fundamentals of designing the production and operation of aircraft gas turbine engines and power plants in the CALS technology system. Book 1, Moscow, Nauka, 2011, p. 813-816).

A known box of motor units for placing the drive units and transmitting to them the torque from the rotor of the engine with orthogonally oriented bevel gears of gear pairs and spur gears of gear pairs. (VV Shelofast. Fundamentals of machine design (2nd edition, Moscow, ed. APM, 2005, p. 320-325).

The disadvantages of the known solutions include the lack of development of a system for selecting the set of necessary parameters and components of the torque transmission mechanism for turbojet engines, lack of adaptation to specific technical solutions of a twin-shaft, dual-circuit aircraft turbojet engine, the difficulty of obtaining a compromise combination of increased values of efficiency and engine life with a simultaneous increase in compactness while reducing material and energy intensity of the torque transmission mechanism.

The problem to be solved by a group of inventions related by a single creative idea is to develop a box of motor units and torque transmission units for KDA units of a twin-shaft, dual-circuit turbojet engine with improved design and operational characteristics, providing increased efficiency, engine life and reliability, ease of installation and maintenance engine.

The problem is solved in that the box of motor units (KDA) of a twin-shaft double-circuit turbojet engine (turbojet engine) having a two-stage low and high pressure compressor with a power intermediate casing, as well as gas-dynamically interconnected coaxial shafts of high pressure rotors (RVD), low pressure ( RND) and the central bevel gear (CCP), according to the invention, comprises a housing made in the form of a three-dimensional closed longitudinally curved shell forming a spatially extended a body with a convex back and a concave part of the side wall of the body with a curvature adapted to the curvature of the engine body facing the engine body, the box consisting of two volumetric shell-shaped parts - the body and the cover, made with flat-bottomed ledges and cylindrical walls of variable curvature, except Moreover, the bottom of the KDA body is made containing openings for mounting motor units, including a centrifugal breather (TsS), a plunger pump (NP), a motor centrifugal pump (DCS) and a flexible shaft assembly for transmitting torque to the units of the remote box of aircraft units (RCA), and the bottom of the KDA cover is made containing openings for mounting motor units on them, including the oil unit (MA), regulator pump (HP) and afterburner pump (NF), moreover, at least, the openings in the KDA for motor units are equipped with circumferential stiffening elements with a flange function and a height exceeding the shell shell thickness not less than three times around the perimeter, and the bottom of the KDA housing and cover is made containing a radially facing set stiffeners and at least one set of intersecting radial circular concentrically spaced stiffeners with an excess above the shell of at least one and a half shell thicknesses, while the KDA has a working torque input reducer containing the main conical gear pair of KDA with gear ratio i _in.p. , consistent with the gear ratio of the CCP and defined in the range i _in.p. = (0.71 ÷ 0.99), and the input shaft of the specified gearbox is structurally made combining the function of the driven wheel shaft of the main gear pair KDA and the function of the spur gear wheel integrally driven with it, driving for multi-stage gearboxes of drives of motor units that are installed in the KDA for transmitting torque last and communicated by torque with the specified cylindrical gear wheel with the formation of branched into two groups of gearboxes drives containing from two to five Teren gear pairs.

In this case, the KDA housing can be saddle-shaped can be placed on the upper part of the intermediate engine housing and provided at the ends and in the concave part with external fastening elements to the intermediate engine housing, and the bottom of the KDA housing is made frontally oriented in the direction of flight (n.p.) and parallel to the plane the flange of the box, and the input of torque into the housing KDA is made in the concave part of the side wall of the housing and includes a spring connecting the driven conical wheel of the CCP to the driving wheel of the main conical pole rennoy pair, a driven wheel which is mounted on the input shaft of the gearbox CDA, and in the bottom of the case and cover KDA performed for at least three openings for the intermediate gear shafts gear motor assemblies.

KDA can be equipped with motor units mounted on the housing and cover, variably communicated by torque through the central control gear with the high pressure hoses shaft by means of multi-stage gear drives of units mounted in the internal volume of the KDA with the ability to switch the units to work from the starter as a source of starting torque in the starting mode motor, including with a change in the configuration of multi-stage gearboxes of drives, including the number and type of gear stages and gear values numbers.

KDA can be equipped with motor units mounted on the case and cover of the box, variably communicated by torque through the central control gear with the HPH shaft by means of multi-stage gearboxes of drive units mounted in the internal volume of the KDA with the formation of two groups of multi-stage gearboxes connected to a cylindrical drive in normal operation of the engine gear on the input shaft of the KDA with the formation of branching gear stages with the possibility of supplying torque to the specified engine units, the first group of unit drive gearboxes includes a two-stage regulator pump regulator, three-stage centrifugal and plunger pump breather reducers, five-stage gearboxes of two motor centrifugal pump and oil unit gearboxes, the sequence of common gear ratios of each of the multi-stage gearboxes of the drive units of the first motor units groups within the KDA, counting from the cylindrical wheel on the input shaft of the gearbox of the KDA drives, define and in the range of ratios

(i _r.v. = i _ckp ): i _ccp. : i _nr : i _cs : i _np : i _dtsn. : i _ma = (1.01 ÷ 1.43) :( 0.71 ÷ 0.99) :( 0.37 ÷ 0.53) :( 0.77 ÷ 0.99: (0.26 ÷ 0 , 36) :( 0.45 ÷ 0.64) :( 0.45 ÷ 0.64),

where (i _p.v. = i _ccc ) is the gear ratio on the input spring of torque in the KDA equal to the gear ratio of the _{central control} gear; i _gkp. - the same, the main conical gear pair of KDA; i _np - the same, gear pump regulator; i _cc - the same as a centrifugal breather reducer; i _np - the same, gear pump plunger; i _dtsn. - the same gear motor centrifugal pump; i _ma - the same, gear unit; and the other group of gearboxes includes two-stage gearboxes of the afterburner pump and the VKA flexible torque transmission shaft, and the sequence of general gear ratios of each of the multi-stage gearboxes of the drives of the mentioned motor units of the second group within the KDA, counting from the cylindrical wheel on the input shaft of the gearbox of the KDA drive gearbox, is defined in the ranges ratios

(i _r.v. = i _ckp ): i _nf : i _gv = (1.01 ÷ 1.43) :( 0.71 ÷ 0.99) :( 1.73 ÷ 2.44) :( 0, 59 ÷ 0.83),

where (i _p.v. = i _ccc ) is the gear ratio on the input spring of torque in the KDA equal to the gear ratio of the _{central control} gear; i _nf - the same as a boost pump gearbox; i _guards - the same as a flexible shaft gearbox.

The contact ends of the case and the lid of the box can be equipped with flanges of detachable connection with holes for at least three types of elements - centering, mounting and dismounting with an excess of the number of the second relative to the first not less than eight times.

The generatrix of the cylindrical surface of the housing and the cover of the KDA can be located parallel to the axis of the shaft of the WFD.

The problem of the second object of the group of inventions is solved in that the KDA turbofan engine housing of a twin-shaft twin-circuit turbojet engine having a housing and a two-stage low and high pressure compressor with a power intermediate housing, according to the invention, is made in the form of a three-dimensional closed longitudinally curved shell forming an extended spatial body with a convex back and a concave part of the side wall of the housing with a curvature adapted to the curvature of the motor housing facing the engine housing For this, the KDA includes two voluminous shell-shaped parts — the case itself and the cover, made with a ledge-like flat bottom and cylindrical walls of variable curvature, while the contact ends of the case and the box lid are equipped with detachable flanges with holes for at least three types of functional mounting and dismantling elements - centering, fastening and dismounting with an excess of the number of fasteners relative to the centering or dismantling (8 ÷ 11) times, and the KDA body is saddle-shaped placed on the upper part of the intermediate engine casing and provided at the ends and in the concave part with external fasteners to the intermediate engine casing, and the bottom of the KDA housing is made frontally oriented in the direction of flight (n.p.) and parallel to the plane of the connector of the KDA flanges, while the concave part of the side wall of the KDA housing has an opening for introducing torque through a spring connecting the drive wheel of the main gear conical pair of the KDA to the driven conical wheel of the CCP; in addition, the bottom of the KDA housing is made about containing openings for mounting engine assemblies, including a centrifugal breather, plunger pump, motor centrifugal pump and flexible shaft drive for transmitting torque to the units of the remote box of aircraft units (RCA), and the bottom of the KDA cover is made containing openings for mounting units on them the engine, including the oil unit, the pump regulator and the afterburner pump, and at least the openings in the KDA box for mounting the motor units are equipped with circumferential stiffening elements of height along the perimeter, at least three times the thickness of the casing shell, while the bottom of the casing and the cover and casing of the KDA is made containing a set of radial stiffeners protruding into the casing with an excess above the shell of at least one and a half thicknesses of the latter, in addition, the bottom of the KDA cover is made containing facing in the body, at least one set of stiffening ribs intersecting with the radial circular concentrically spaced apart with an excess above the shell of at least one and a half shell thicknesses.

At the same time, at the bottom of the housing and cover KDA can be made of at least three openings under the intermediate gear shafts of the gearboxes of the motor units.

At least a part of the intersections of the radial and circular ribs can be made in the cap KDA with tides in the form of bosses with holes for fasteners for the flange connection of the pump-regulator.

The problem of the third object of the group of inventions is solved by the fact that the main conical gearbox of the KDA of the twin-shaft twin-circuit turbojet engine having a housing and gas-dynamically interconnected coaxial shafts of the HPH, RND and central bevel gear, according to the invention, is placed in the housing of the KDA with mounting places for assembly units KDA and includes the main conical gear pair of KDA mounted with the connection in the indicated places and the orthogonally oriented conical drive and follower gears, the driving gear has a conical toothing arranged at the angular frequency of teeth Z ₁ γ _1, defined in the range of γ ₁ = (3,34 ÷ 4,78) [U / rad], and a return toothing of the driven wheel made with an angular frequency γ _{2 of} teeth Z ₂ , which is defined in the range γ ₂ = (3.98 ÷ 5.74) [units / rad], and the main gear pair of the leading and driven gears of the GKP KDA is made with a gear ratio i _{1, rn} certain range _{i i, r} = (0,71 ÷ 0,99), wherein the driving gear main conical gear-pairs with a DKP KDA a hub integrated into the pin of the pinion shaft, and the shaft is mounted in angular contact ball and roller bearings, the last of which is made with rolling bodies supported directly on the shaft end, and the outer ring of the roller bearing is installed in the housing of the latter, made together with the extension to the housing of the ball bearing by the cage of the driving bevel gear, and the reciprocal driven bevel gear is mounted on the input shaft of the KDA with two bearings - supporting ball bearing mounted on the shaft end from the side of the driven wheel, and a thrust roller bearing mounted on the opposite end of the shaft, and the driven conical wheel is detachably fixed to the shaft neck in the form of an intermediate flange by means of fasteners installed in the coaxial holes of the flange and the wheel with an angular frequency γ _hole > 0.79 [units / rad], in addition, on the section of the input shaft of the KDA between the roller bearing and the conical driven wheel, a cylindrical gear wheel is driven together with it for all KDA gearboxes in the operation mode of the HPC rotor engine, having a disk with a rim, the gear rim of which is made with an angular frequency γ of ₁ teeth Z ₁ , defined in the range of γ of ₁ = (2.87 ÷ 4.30) [units / rad], as well as a web turning into a hub integrated with the neck of the shaft within the wall thickness of the latter.

In this case, the leading gear conical wheel of the HCP with roller and thrust ball bearings can be installed in a cage having a small cylindrical end section with the function of a roller bearing housing, covering the outer ring of the roller bearing and passing into the conical section of the cage along the office and from the outer end, conjugated in turn with an expanded cylindrical section, while in the mating zone of the conical and cylindrical sections along the height of the cage and in the angular range of contact of the teeth of the tooth In the casing of the cage, an aperture is made with an angular target in the projection onto a plane normal to the axis of the driving conical wheel, sufficient to expose at least six teeth of the driven conical wheel of the hydraulic circuit board, in addition, the cylindrical section of the casing is provided with a flange mated through detachable elements from the outside with the flange of the housing KDA and on the inside with the flange of the ring holder of the ball bearing housing.

The problem of the fourth object of the group of inventions is solved by the fact that the leading bevel gear of the main bevel gear KDA of a twin-shaft twin-circuit turbojet engine having a housing and gas-dynamically interconnected coaxial shafts of the HPH, RND and TsKP, according to the invention, is included in the main bevel gear pair GKP KDA includes a hollow shaft, a wheel disk made integral with it, having a tapered rim with a ring gear, a web containing a conditional middle conical surface and developed in In this direction, a hollow cylindrical hub integrated in the middle axial section of the shaft, simultaneously endowed with the function of a support pin, and equipped with slots on the inside of the shaft to form a seat for the spline end of the drive spring transmitting torque through the driven wheel of the main gear pair to the engine KDA units, In this case, the drive shaft end caps, the upper and lower ones, facing the axis of the HPH shaft, are provided with external seats located on both sides of the wheel disk, respectively enno under shariko- and roller bearings and the drive wheel has a conical toothing, angular frequency γ ₁ teeth Z ₁ is defined in the range of γ ₁ = (3,34 ÷ 4,78) [U / rad], the teeth are made variable crown height decreasing towards the axial vertex of the conditional cone of the tooth peaks with a gradient of G ₁ defined in the range

G ₁ = (N _{z1, max} -N _{z1, min} ) / B _z1 = (0.14 ÷ 0.20) [m / m],

where H _{z1, max} - the highest height of the involute part of the lateral surface at the outer peripheral end of the tooth in projection onto the conditional axial plane passing through the midpoint of the tooth apex; H _{z1, min} - the same, the smallest height of the involute part of the lateral surface of the tooth at the inner end of the latter; B _z1 - the width of the tooth in the same projection; the angle α _{o.d.k1 of} inclination of the generatrix of the conditional dividing cone of the _ring gear to the axis of the drive wheel shaft is defined in the range α _o.d.k = (0.59 ÷ 0.85) [rad], and the ring gear of the drive wheel is made with teeth of a circular configuration with a radius R _{kp.1 of the} curvature of the tooth apex in projection onto a plane normal to the axis of the shaft of the drive wheel, scalarly exceeding the average tooth height _{Hz 1} , _cf. N ₁ times, where N _{1 is} defined in the range

N ₁ = (R _kp1 / H _{z1, cp.} ) = (8.1 ÷ 12.1),

and the angle of the spiral β _W1 , expressed in the same projection as the angle between the tangent to the tooth line at the midpoint of the last and the radius of the same point drawn from the axis of the shaft of the drive wheel, is optionally defined in the range of values β _W2 = (0.21 ÷ 0, 32) [too happy].

The upper end of the wheel shaft can be made with the possibility of direct support on its lateral surface of the rolling elements of the roller bearing, fenced from the outside by the outer ring of the latter.

Angle α _o.k.ver. the inclination of the generatrix of the initial cone of the tops of the teeth relative to the axis of the drive wheel can be determined in the range of values α _o.c.ver. = (0.65 ÷ 0.92) [rad] and performed exceeding the same angle α _o.c.p. the slope of the generatrix of the conditional cone of the troughs, which, in compliance with the specified condition, is determined in the range of values of α _b.p. = (0.50 ÷ 0.76) [rad].

The task of the fifth object of the group of inventions is solved by the fact that the driven bevel gear of the main bevel gear KDA of a twin-shaft twin-circuit turbojet engine having a housing and gas-dynamically interconnected coaxial shafts of the HPH, RND and TsKP, according to the invention, is included in the main bevel gear pair GKP KDA , contains a disk having a rim with a bevel gear, a sheet of minimum radial height, variable in thickness height and with an outer side surface that is made to recess, and the hub, while in the canvas there are recesses made according to the number of holes for fasteners of detachable connection with the flange of the input shaft of the KDA installed in the coaxial holes of the flange and the wheel with an angular frequency of γ _open > 0.79 [units / rad], with the formation between recesses of conical stiffeners of the type buttresses connecting the rim of the disk to the hub, and the conical gear ring of the driven wheel is made with an angular frequency γ _{2 of} teeth Z ₂ , which is defined in the range of γ ₂ = (3.98 ÷ 5.74) [units / rad] In addition, the driven wheel is endowed with internal qil with a landing seat and an end stop for supporting and locating the wheel on the input shaft of the KDA, while the cylindrical seat of the hub of the drive of the driven conical wheel is made coaxial to the specified shaft, and the teeth of the conical crown of the driven wheel are made of variable height, decreasing towards the axial vertex of the conditional cone of the vertices teeth with a gradient of G ₂ defined in the range

G ₂ = (N _{z2, max} - N _{z2, min} ) / B _z2 = (0.17 ÷ 0.24) [m / m],

where H _{z2, max} - the highest height at the outer peripheral end of the tooth of the wheel in projection on the conditional axial plane passing through the midpoint of the top of the tooth; H _{2, min} - the same, the smallest tooth height at the inner end of the latter; In _z2 - the width of the tooth in the same projection; wherein the angle α _{o.d.k2 of the} inclination of the generatrix of the conditional dividing cone of the gear to the axis of the driven wheel shaft is defined in the range α _o.d.k2 = (0.74 ÷ 1.04) [rad], in addition, the gear ring of the driven the wheel is made with circular teeth of radius R _{kp.2 of a} circular configuration of the tooth tip in a projection onto a plane normal to the axis of the driven wheel shaft, scalarly exceeding the average tooth height N _{s2, cf.} N ₂ times, where N _{2 is} defined in the range

N ₂ = (R _cr2 / H _{s2, cp.} ) = (8.24 ÷ 12.3),

and the angle of the spiral β _W2 , expressed in the same projection as the angle between the tangent to the tooth line to the midpoint and the radius of the same point drawn from the axis of the shaft of the driven wheel, is optionally defined in the range of values β _W2 = (0.21 ÷ 0.32 ) [glad].

The problem of the sixth object of the group of inventions is solved by the fact that the input shaft KDA of a twin-shaft double-circuit turbojet engine having a housing and gas-dynamically interconnected coaxial shafts of the HPH, RND and TsKP, according to the invention, is made hollow, provided with seats for a thrust roller bearing at one end and under the thrust ball bearing at the opposite end, in addition, the KDA input shaft is endowed with a seat for the placement of the driven bevel wheel of the main gear pair KDA and has adjacent thereto formed integrally with the shaft an annular flange which is provided with openings for the fasteners detachably connected to the driven wheel, spaced perimeter flange having an angular frequency γ _otv> 0.79 [units / rad] In addition, the area the input shaft of the KDA between the roller bearing and the flange of the bevel driven wheel is made together with the shaft by a cylindrical gear wheel, drive for all KDA gearboxes, having a disk with a rim, the gear ring of which is made with an angular frequency of _{c. 1} teeth Z _{c. 1} , defined Noah in the range of γ _TS1 = (2.87 ÷ 4.30) [units / rad], and also having a web that goes into the hub, integrated with the neck of the shaft within the wall thickness of the latter, and receives torque from the shaft of the HPC rotor in engine operation mode.

The technical result achieved by the group of inventions related by a single creative idea is to develop a KDA turbofan engine and its components, which in the process of operating the engine provide a combined increase in efficiency by 2% and more than double the resource of the torque transmission mechanism and the engine as a whole due to geometrical parameters of KDA found in the invention, ensuring balanced ratios of ranges of gear ratios of gear ratios of gear pairs of multistage gearboxes of drive units with improved the kinematics of gearboxes of drives transmitting torque to the units with less energy loss while reducing material consumption, the number of assembly units and increased alignment of gearbox sections interlocked in an optimized KDA housing, thereby achieving a combined efficiency increase of 2% and more than double the engine life during its operation.

The invention is illustrated by drawings, where:

in FIG. 1 shows a box of propulsion units, side view;

in FIG. 2 - KDA, kinematic diagram of the transmission of torque to units;

in FIG. 3 - main bevel gear KDA, longitudinal section;

in FIG. 4 - leading bevel gear GKP KDA, a longitudinal section;

in FIG. 5 - input shaft KDA with driven bevel gear GKP KDA, longitudinal section.

The turbojet engine is double-shaft, double-circuit. The turbojet engine contains a two-stage low and high pressure compressor with a power intermediate casing and gas-dynamically interconnected coaxial shaft of the high pressure rotor - HPH and low pressure rotor shaft - HPH (not shown in the drawings). The mechanism for transmitting torque to the KDA turbojet units includes a central bevel gear 1 connected to the HPA with the possibility of transmitting the torque to the units from the high-pressure turbine and kinematically connected to it gearboxes of the drive units of the motor units installed in the box of the engine units of KDA-2, and gearboxes of the drives of the aircraft units, installed respectively in the box of aircraft assemblies (KSA) (not shown in the drawings).

KDA-2 (Fig. 1) contains a casing 3, which is made in the form of a three-dimensional closed longitudinally curved shell, forming an extended spatial body with a convex back 4 and facing the engine case with a concave part 5 of the side wall of the case with a curvature adapted to the curvature of the engine case. KDA-2 consists of two volumetric shell-shaped parts - the body 3 and the cover 6, made with a flat bottom having ledges and cylindrical walls of variable curvature. The generatrix of the cylindrical surface of the housing 3 and cover 6 KDA-2 is located parallel to the axis of the shaft of the WFD.

The bottom of the housing 3 KDA-2 is made containing openings for the installation of motor units - the centrifugal breather TsS-7, the plunger pump NP-8, the motor centrifugal pump DCN-9 and the flexible shaft assembly 10 for transmitting torque to the units of the remote box of aircraft units (RCA) . Cover 6 KDA-2 is made with openings for mounting motor units on them - MA-11 oil unit, HP-12 regulator pump and NF-13 afterburner pump. At least, the openings in KDA-2 for motor units are provided around the perimeter with ring stiffening elements 14 with a flange function of a height exceeding the thickness of the shell of the housing 3 by at least three times. The bottom of the body 3 and the cover 6 KDA-2 is made containing a set of radial stiffeners facing the body 3 and at least one set of intersecting radial circular concentrically spaced stiffeners with an excess above the shell of at least one and a half shell thickness (not shown in the drawings) .

In KDA-2, a gearbox for inputting working torque, comprising the main bevel gear pair 15 of the KDA, including the leading and driven bevel gears 16 and 17, respectively, with a gear ratio of _i.p. , consistent with the gear ratio of the CCP and defined in the range i _in.p. = (0.71 ÷ 0.99). The input shaft 18 of the input drive of the torque is structurally made combining the function of the shaft of the driven wheel 17 of the main gear pair 15 and the function of the spur gear shaft 19 made in one piece, which is made drive for multi-stage gear drives of drives of motor units that are installed in the KDA for transmitting torque the last moment. The gearboxes of the units are communicated in terms of torque with a cylindrical gear wheel 19 with the formation of drives branched into two groups of gearboxes containing from two to five gear gear pairs.

The housing 3 KDA-2 is saddle-mounted on the upper part of the intermediate engine casing and is equipped at the ends and in the concave part with external elements 20 for fastening to the intermediate engine casing. The bottom of the housing 3 KDA made frontally oriented in the direction of flight (n.p.) and parallel to the plane of the connector flanges of the box. The input of torque into the housing 3 KDA is made in the concave part 5 of the side wall of the housing and includes a spring 21. Spring 21 is made connecting the driven bevel wheel 22 TsKP-1 with the driving wheel 16 of the main gear pair 15, the driven wheel 17 of which is mounted on the input shaft 18 of the gearbox KDA. At the bottom of the housing 3 and the cover 6 of the KDA housing, at least three openings are made for the intermediate gear shafts 23, 24, 25 of the gearboxes of the motor units.

The contact ends of the housing 3 and the lid 6 of the box are equipped with flanges of detachable connection with holes for at least three types of elements - centering 26, fixing 27 and dismounting 28 with an excess of the number of fixing elements 27 relative to the centering elements 26 or dismantling elements 28 in (8 ÷ 11) time.

At least part of the intersections of the radial and circular ribs are made in the cover 6 of the KDA with tides 29 in the form of bosses with holes for fasteners for the flange connection of the HP-12 regulator pump.

KDA-2 is equipped with motor units mounted on housing 3 and cover 6, which are variably communicated by torque through TsKP-1 with a high-pressure hoses shaft by means of multi-stage gear drives for units mounted in the internal volume of the KDA with the ability to switch units to work from a starter (not shown in the drawings ) as a source of starting torque in the engine starting mode, including with a change in the configuration of multi-stage gearboxes of drives, including the number and type of gear stages and gears ratios of gear ratios.

KDA-2 is equipped with motor units mounted on the housing 3 and cover 6 (Fig. 2), variably communicated by torque through TsKP-1 with the HPH shaft by means of multi-stage gear drives of the units drives mounted in the internal volume of the KDA with the formation of two engines in normal operation groups of multi-stage gearboxes connected to the driving spur wheel 19 on the input shaft 18 of the KDA with the formation of branching gear stages with the possibility of supplying torque to the motor unit am.

The first group of unit drive gearboxes includes a two-stage gearbox HP-12, three-stage gearboxes ЦС-7 and NP-8, five-stage gearboxes ДЦН-9 and МА-11. The sequence of the total gear ratios of each of the multi-stage gearboxes of the drives of the mentioned motor units of the first group within the KDA, counting from the cylindrical wheel 19 on the input shaft 18 of the gearbox of the KDA drives, is defined in the ranges of ratios

(i _r.v. = i _ckp ): W _gkp. : i _nr : i _cs : i _np : i _dtsn. : i _ma = (1.01 ÷ 1.43) :( 0.71 ÷ 0.99) :( 0.37 ÷ 0.53) :( 0.77 ÷ 0.99: (0.26 ÷ 0, 36) :( 0.45 ÷ 0.64) :( 0.45 ÷ 0.64),

where (i _p.v. = i _ccc ) is the gear ratio on the spring 21 input torque in KDA, equal to the gear ratio CKP-1; i _gkp. - the same, the main bevel gear pair 15 KDA; i _np - the same, gearbox HP-12; i _cs - the same, gearbox ЦС-7; i _np - the same gear NP-8; i _dtsn. - the same, gearbox ДЦН-9; i _ma - the same gearbox MA-11.

The second group of gear drives of units drives includes two-stage gearboxes NF-13 and flexible shaft 10 transmitting torque VKA. The sequence of the total gear ratios of each of the multi-stage gearboxes of the drives of the mentioned motor units of the second group within the KDA, counting from the cylindrical wheel 19 on the input shaft 18 of the gearbox of the KDA gearbox, is defined in the ranges of ratios

(i _r.v. = i _ckp ): i _nf : i _gv = (1.01 ÷ 1.43) :( 0.71 ÷ 0.99) :( 1.73 ÷ 2.44) :( 0, 59 ÷ 0.83),

where (i _p.v. = i _ccc ) is the gear ratio on the spring 21 input torque in KDA, equal to the gear ratio CKP-1; i _nf - the same gear NF-13; i _Guards - the same gearbox of the flexible shaft 10 transmitting torque VKA.

The main bevel gear (Fig. 3) is placed in the housing 3 of the KDA-2 with mounting places for the assembly units of the KDA and includes the main bevel gear pair 15 of the KDA mounted in the indicated places with orthogonally oriented bevel gears 16 and 17, respectively.

The drive gear 16 has a bevel gear made with an angular frequency γ _{1 of the} teeth 30, defined in the range

γ ₁ = N _Z1 / 2π = (3.34 ÷ 4.78) [unit / rad],

where N _Z1 - the number of teeth Z _{1 of the} driving wheel HCP.

The reciprocal driven gear 17 has a gear, the angular frequency γ _{2 of the} teeth 31 of which is defined in the range

γ ₂ = N _Z2 / 2π = (3.98 ÷ 5.74) [u / rad],

where N _Z2 - the number of teeth Z ₂ driven wheel HCP.

The main gear pair 16 of the driving and driven gears 16 and 17 of the ГКП КДА is made with a gear ratio i _{1, gp} , defined in the range i _{1, gp} = (0.71 ÷ 0.99).

The drive gear 16 of the main bevel gear pair 15 GKP KDA has a hub 32 integrated in the axle 33 of the shaft 34 of the drive wheel 16. The shaft 34 is mounted in an angular contact ball bearing 35 and a roller bearing 36. The roller bearing 36 is made with rolling bodies supported directly on the shaft end 34. The outer ring 37 of the roller bearing 36 is mounted in the housing 38 of the latter, made integrally with the yoke 40 of the driving bevel gear 16, which was extended until the ball bearing 35 is attached to the housing 39.

The reciprocal driven bevel gear 17 is mounted on two input bearings 18 on the input shaft 18 KDA-2 - a thrust ball bearing 41 on the end of the shaft 18 from the side of the driven wheel 17 and the thrust roller bearing 42. The roller bearing 42 is mounted on the opposite end of the shaft 18. Driven conical wheel 17 is detachably fixed to the shaft journal 18 in the form of an intermediate flange 43 by fasteners 44. fasteners 44 are installed in aligned bores of the flange 43 and the driven wheel 17 with an angular frequency γ _otv> 0.79 [units / rad] .

On the section of the input shaft 18 of the KDA between the roller bearing 42 and the driven wheel 17, a cylindrical gear wheel 19 is made together with it, driving for all KDA gearboxes in the operation mode of the KBD rotor engine. The cylindrical gear wheel 19 includes a disk 45 with a rim 46, as well as a blade 47, passing into the hub, integrated with the neck of the shaft 18 within the wall thickness of the latter.

The rim 46 of the disk is made with an angular frequency γ _{c. 1} teeth 48 of the gear, defined in the range

γ _q 1 = N _{q 1/2} / 2π = (2.87 ÷ 4.30) [u / rad],

where N _C.1 - the number of teeth Z _{C.1 of a} cylindrical wheel 19.

The leading gear conical gear wheel 16 of the hydraulic control gear with roller and thrust ball bearings 36 and 35 are mounted in a cage 40. The cage 40 includes a small cylindrical end portion with the function of the housing 38 of the bearing 36, covering the outer ring 37 of the roller bearing 36 and passing into the conical section 49 of the holder 40 conjugated in turn with the expanded cylindrical section 50 of the holder 40. In the mating zone of the conical and expanded cylindrical sections 49 and 50 along the height of the holder 40 and in the angular range to ntakta teeth 30 and 31 of the toothings is formed in the shell holder opening 51 with an angular projection on the shots in a plane normal to the axis of the driving bevel gear 16, sufficient to expose at least six teeth 31 of the driven bevel gear 17 SCE. The expanded cylindrical section 50 of the cage 40 is provided with a flange 52, conjugated by means of detachable elements 53 from the outside to the flange 54 of the housing 3 KDA and from the inside to the flange 55 of the ring holder of the housing 39 of the ball bearing 35.

The leading bevel gear 16 (Fig. 4), which is included in the main bevel gear pair 15 of the GCC KDA, includes a hollow shaft 34 and a wheel disk 56 made integrally with it. The disk 56 includes a bevel rim 57 with a ring gear and the blade 58. The blade 58 contains a conditional middle conical surface and an axially developed hollow cylindrical hub 32 integrated into the middle axial portion of the shaft, at the same time endowed with the function of the support pin 33, and equipped on the inside of the shaft 34 by splines 59 to form a seat for the spline end of the drive spring 21, which transmits torque through the driven wheel 17 of the gear pair 15 to the engine KDA units.

The ends of the shaft 34 of the driving wheel 16, the upper and lower facing the axis of the shaft of the WFD, are provided with external seats located on both sides of the disk 56 of the wheel, respectively, under the ball bearing 35 and the roller bearing 36.

The drive gear 16 has a bevel gear made with an angular frequency γ _{1 of the} teeth 30, defined in the range

γ ₁ = N _Z1 / 2π = (3.34 ÷ 4.78) [unit / rad],

where N _Z1 - the number of teeth Z _{1 of the} driving wheel HCP;

The teeth 30 of the crown are made of variable height, decreasing towards the axial top of the conditional cone of the tops of the teeth with a gradient of G ₁ defined in the range

G ₁ = (N _{z1, max} - N _{z1, min} ) / B _z1 = (0.14 ÷ 0.20) [m / m],

where H _{z1, max} - the highest height of the involute part of the lateral surface at the outer peripheral end of the tooth in projection onto the conditional axial plane passing through the midpoint of the tooth apex; H _{z1, min} - the same, the smallest height of the involute part of the lateral surface of the tooth at the inner end of the latter; B _z1 - the width of the tooth in the same projection.

The angle α _{o.d.k1 of} inclination of the generatrix of the conditional dividing cone of the _ring gear to the axis of the shaft 34 of the drive wheel is defined in the range α _o.d.k1 = (0.59 ÷ 0.85) [rad].

The toothed crown of the driving wheel 16 is made with teeth 30 of a circular configuration with a radius R _{kp.1 of the} curvature of the tooth apex in projection onto a plane normal to the axis of the shaft 34 of the driving wheel, scalarly exceeding the average tooth height _{Hz 1} , _cf. N ₁ times, where N _{1 is} defined in the range

N ₁ = (R _kp1 / H _{z1, cp.} ) = (8.1 ÷ 12.1).

The angle of the spiral β _W1 , expressed in the same projection as the angle between the tangent to the tooth line at the midpoint of the last and the radius of the same point drawn from the axis of the shaft of the drive wheel, is optionally determined in the range of values β _W1 = (0.21 ÷ 0.32 ) [glad].

The upper end of the shaft 34 of the drive wheel 16 is made with the possibility of direct support on its side surface of the rolling bodies of the roller bearing 36, fenced from the outside by the outer ring 37 of the latter.

Angle α _o.k.ver. the inclination of the generatrix of the initial cone of the vertices of the teeth 30 relative to the axis of the driving wheel 16 is determined in the range of values α _o.c. = (0.65 ÷ 0.92) [rad] and performed exceeding the same angle α _o.c.p. the slope of the generatrix of the conditional cone of the troughs, which, in compliance with the specified condition, is determined in the range of values of α _b.p. = (0.50 ÷ 0.76) [rad].

The driven bevel gear 17 (Fig. 5), which is included in the main bevel gear pair 15 of the CCA KDA, contains a disk 60 having a rim 61 with a bevel gear rim, a blade 62 of a minimum radial height, variable in thickness height and with an outer side surface that made conical, and the hub 63.

In the blade 62 of the driven wheel 17, recesses are made according to the number of holes for fasteners 44 of a detachable connection to the flange 43 of the input shaft 18 of the KDA, with the formation of buttresses between the notches of the conical stiffeners connecting the rim 61 of the disk with the hub 63. The fasteners 44 are installed in coaxial holes the flange 43 and the driven wheel 17 with an angular frequency γ _holes > 0.79 [units / rad].

The driven wheel 17 has a gear ring, the angular frequency γ _{2 of the} teeth 31 of which is defined in the range

γ ₂ = N _Z2 / 2π = (3.98 ÷ 5.74) [u / rad],

where N _Z2 - the number of teeth Z ₂ driven wheel HCP.

The driven wheel 17 is endowed with an inner cylindrical landing and end thrust seats 64 and 65 for supporting-thrust placement of the wheel on the input shaft 18 KDA. The cylindrical seat 64 of the hub 63 of the disc of the driven wheel 17 is made coaxial to the input shaft 18 KDA.

The teeth 31 of the conical crown of the driven wheel 17 are made of variable height, decreasing towards the axial top of the conditional cone of the tops of the teeth with a gradient of G ₂ defined in the range

G ₂ = (N _{z2, max} - N _{z2, min} ) / B _z2 = (0.17 ÷ 0.24) [m / m],

where H _{z2 max} - the highest height at the outer peripheral end of the tooth of the wheel in projection on the conditional axial plane passing through the midpoint of the top of the tooth; H _{2, min} - the same, the smallest tooth height at the inner end of the latter; In _s2 - the width of the tooth in the same projection.

The angle α _{o.d.k2 of} inclination of the generatrix of the conditional dividing cone of the _ring gear to the shaft axis of the driven wheel 17 is defined in the range α _o.d.k2 = (0.74 ÷ 1.04) [rad].

The _gear wheel of the drive wheel is made with circular teeth of radius R _{cr. 2 of the} circular configuration of the tooth tip in a projection onto a plane normal to the axis of the drive wheel shaft, scalarly exceeding the average tooth height N _{s2, cf.} N ₂ times, where N _{2 is} defined in the range

N ₂ = (R _cr2 / H _{s2, cf.} ) = (8.15 ÷ 12.23).

The angle of the spiral β _W2 , expressed in the same projection as the angle between the tangent to the tooth line to the midpoint and the radius of the same point drawn from the axis of the shaft of the drive wheel, is optionally defined in the range of values β _W2 = (0.21 ÷ 0.32) [glad].

The input shaft of the KDA is hollow (Fig. 5), equipped with seats 66 and 67, respectively, under the support roller bearing 36 at one end and under the support-thrust ball bearing 41 at the opposite end. In the axial interval from the seat 67 for the thrust ball bearing 41, the input shaft 18 is endowed with a seat 68 for the placement of the driven bevel wheel 17 of the main gear pair 15 of the GPC KDA and has an annular flange 43 adjacent to it and made together with the shaft 18. Flange 43 provided with holes for fasteners 44 detachably connected to the driven bevel gear 17. The fastening elements 44 are installed in aligned bores of the flange 43 and the driven wheel 17 spaced along the perimeter of the flange having an angular frequency γ _otv> 0.79 [units / rad].

In the area of the input shaft 18 of the KDA between the roller bearing 36 and the flange 43 of the conical driven gear 17, a cylindrical gear wheel 19 is mounted which is driven by all the gearboxes of the KDA. The cylindrical gear wheel 19 includes a disk 45 with a rim 46, as well as a blade 47 passing into a hub integrated with the neck of the shaft 18 within the wall thickness of the latter and receiving torque from the shaft of the HPC rotor in engine operation mode.

The rim 46 of the disk is made with an angular frequency γ _{c. 1} teeth 48 of the gear, defined in the range

γ _q 1 = N _{q 1/2} / 2π = (2.87 ÷ 4.30) [u / rad],

where N _C.1 - the number of teeth Z _{C.1 of a} cylindrical wheel 19.

Implementation example

The mechanism for transmitting torque to the units of a twin-shaft turbofan engine is as follows. They make parts, assemblies and assembly units, including bevel and spur gears and shafts TsKP-1, as well as gear drives for drives of motor and aircraft units KDA-2 and KSA. They perform the casting of the housing and the cover of the CCP and KDA, in which the machining surfaces, including grinding, prepare the contact surfaces of the flanges and seats by chrome plating and coating the surface under the bearings in the housing of the CCP.

In housing 3 KDA-2 assemble the main bevel gear pair 15 GKP KDA. The leading gear bevel gear 16 of the hydraulic control gear with roller and thrust ball bearings 36 and 35 is installed in the cage 40. The cage 40 is made covering the outer ring 37 of the roller bearing 36 around the office and from the outer end end. In the cage 40, an opening 51 is sufficient to expose the teeth 31 driven conical wheel 17 GKP. The cylindrical section 50 of the yoke 40 is provided with a flange 52 for fastening by means of detachable elements 53 with a flange 54 of the housing 3 of the KDA from the outside and from the inside with the flange 55 of the ring holder of the housing 39 of the ball bearing 35. The counter follower bevel gear wheel 17 of the gear pair 15 is mounted on the input shaft 18 KDA-2 on two bearings - thrust ball bearing 41 and thrust roller bearing 42. The driven bevel wheel 17 is fixed to the flange 43 of the shaft 18 by means of six fasteners 44.

The manufactured drive wheel 16 is performed with a bevel gear in the total number of teeth in the gear N _Z1 = 26 teeth. The driven wheel 17 is performed with a bevel gear in the total number of teeth in the ring N _Z2 = 33 teeth. Thus, the main gear pair 15 of the driving and driven gears 16 and 17 of the GKP KDA is performed with a gear ratio of i _{1, rn} = 0.79.

From assembly units - cylindrical gears and shafts, KDA drive gearboxes are assembled and mounted in the cover 6 and housing 3 of the KDA gear transmission of torque to the units. The contact ends of the housing 3 and the cover 6 KDA center and connect the fasteners 27. The assembled housing 3 KDA-2 is fixed to the upper part of the intermediate motor housing by means of external mounting elements 20. The input of torque into the housing 3 KDA is performed by means of a spring 21, which connects the driven bevel wheel 22 TsKP-1 with the drive wheel 16 of the main gear pair 15 GKP.

The motor units are mounted on housing 3 KDA-2 - the centrifugal breather TsS-7, the plunger pump NP-8, the motor centrifugal pump DCN-9 and the flexible shaft assembly 10 for transmitting torque to the VKA units. On the cover 6 KDA-2 mounted oil unit MA-11, pump-regulator HP-12 and afterburner NF-13.

KDA-2 engine units report torque through TsKP-1 with a high-pressure hoses shaft by means of multi-stage gear drives of units drives with the possibility of switching units to work from a starter as from a starting torque source in engine start mode.

KDA-2 engine units report the torque through TsKP-1 with the high pressure hoses shaft by means of multi-stage gear drives of the units drives with the formation of two groups of multi-stage gears connected to the spur gear wheel 19 on the input shaft 18 of the KDA in the normal engine operation mode. The first group of unit drive gearboxes includes a two-stage gearbox HP-12, three-stage gearboxes ЦС-7 and NP-8, five-stage gearboxes ДЦН-9 and МА-11. The second group of gear drives of units drives includes two-stage gearboxes NF-13 and flexible shaft 10 transmitting torque VKA.

The mechanism for transmitting torque to the KDA units works as follows.

In the normal engine operation mode, the torque transmitted to the KDA engine units is taken from the high-pressure turbine and transmitted to TsKP-1 and then through the spring 21 to the drive wheel 16 of the main gear pair 15 of the GKP. Through the driven wheel 17 of the main gear pair 15 GKP torque is supplied directly to the cylindrical wheel 19 of the input shaft 18 KDA. From a cylindrical wheel 19, through a branched set of gear pairs of gearboxes of the units, the torques are divided and distributed to the specified units and the rotation speed of the input shaft of each unit is proportional to the total gear ratios of the gearboxes. In this case, the gearboxes of the aircraft units mounted in the RCA report the torque to the TsKP-1 in series through the multi-stage gearbox KDA and the connecting flexible shaft 10.

Thus, due to the kinematic compositions of bevel and cylindrical gears, gear pairs developed in the invention, the original composition of multi-stage gearboxes with a branched torque distribution system and the latest gear ratios, as well as structural systems of the mechanism for transmitting torque from the engine WFD shaft found in the invention to motor units in the KDA box, which increase the smoothness and quiet operation of the mechanism while reducing material consumption and the dimensions and components of the mechanism as a whole. Increasing the resource is achieved due to the high maintainability of the KDA, which provides for the interchangeability of parts and pairs of bevel and cylindrical wheels and the possibility of restoring the size of the bearing seats during the operation of the turbojet engine.

The technical result of the group of inventions is also achieved due to the geometric parameters found in the invention of the KDA housing and the structure of multi-stage gearboxes of drive units installed in the KDA housing with balanced ratios of gear ratios of gear ratios of gear pairs of torque transmission gearboxes to KDA aggregates within the ranges of gear ratios specified in the group of inventions numbers. Going up or down for both gear ratios, increasing or decreasing gear ratios, is fraught with difficult to compensate for unbalancing the gear and overloading the gearbox or the impossibility of eliminating the gearbox imbalance resulting from this, worsening the dimensions and weight of the KDA housing, unjustified increase in the material consumption of gear wheels of gear pairs and occupied their volume in the housing KDA, the complexity of installation / dismantling of nodes and assembly units, reducing resource, reliability, efficiency and increasing energy the capacity of the mechanism for transmitting torque to the KDA or the occurrence of a dangerous probability of entering the resonance. The selected ranges of permissible values of the total gear ratios of the KDA units are limited, in addition, by the real variability of the design and the installation capacity of the latter. The effectiveness of the group of inventions is achieved by providing increased maintainability of the torque transmission mechanism nodes developed in the inventions, which reduces labor costs and the time it takes to perform maintenance and all types of engine repairs during its operation.

Claims (30)

1. The box of motor units (KDA) of a twin-shaft double-circuit turbojet engine (turbojet engine) having a two-stage low and high pressure compressor with a power intermediate case, as well as gas-dynamically interconnected coaxial shafts of high pressure rotors (RVD), low pressure (RND) and central bevel gear (CCL), characterized in that it contains a housing made in the form of a three-dimensional closed longitudinally curved shell forming an extended spatial body with a convex back and image a concave part of the side wall of the body with a curvature adapted to the curvature of the engine body, and the box consists of two shell-shaped volumetric parts - the body and the cover, made with ledges with a flat bottom and cylindrical walls of variable curvature, in addition, the bottom of the KDA body made containing openings for mounting motor units, including a centrifugal breather (TsS), a plunger pump (NP), a motor centrifugal pump (DCS) and a flexible shaft assembly for transmitting torque to the units of the remote box of aircraft units (RCA), and the bottom of the KDA cover is made containing openings for mounting motor units on them, including an oil unit (MA), a regulator pump (HP) and an afterburner pump (NF), at least openings in KDA for motor units are equipped with annular stiffeners along the perimeter with a flange function and a height exceeding the shell shell thickness by at least three times, and the bottom of the KDA housing and cover is made containing a set of radial stiffeners facing the housing and not less than m one set of intersecting radial circular concentrically spaced stiffening ribs with an excess above the shell of at least one and a half shell thicknesses, while the KDA has a working torque input gearbox containing the main conical gear pair of the KDA with a gear ratio of _i.s. consistent with the gear ratio defined in the range _i.r. = (0.71 ÷ 0.99), and the input shaft of the specified gearbox is structurally made combining the function of the driven wheel shaft of the main gear pair KDA and the function of the spur gear wheel integrally driven with it, driving for multi-stage gearboxes of drives of motor units that are installed in the KDA for transmitting torque last and communicated by torque with the specified cylindrical gear wheel with the formation of branched into two groups of gearboxes drives containing from two to five Teren gear pairs. 2. The box of motor units according to claim 1, characterized in that the KDA body is saddle-shaped on the upper part of the intermediate engine body and is provided at the ends and in the concave part with external fastening elements to the intermediate engine body, and the bottom of the KDA body is made frontally oriented in the direction of flight (n.p.) and parallel to the plane of the connector of the flanges of the box, and the input of torque into the housing KDA is made in the concave part of the side wall of the housing and includes a spring connecting the driven conical wheel of the CCP with a drive wheel of the main bevel gear pair, the driven wheel of which is mounted on the input shaft of the KDA gearbox, and at the bottom of the housing and cover of the KDA at least three openings are made for the intermediate gear shafts of the gearboxes of the motor units. 3. The box of motor units according to claim 1, characterized in that the KDA is equipped with motor units mounted on the housing and the cover, variably communicated by torque through the central control gear with the RVD shaft by means of multi-stage gearboxes of the drives of the units mounted in the internal volume of the KDA with the possibility of switching the units to work from the starter as a source of starting torque in the engine starting mode, including changing the configuration of multi-stage gearboxes of drives, including the number and type gear stages and gear ratios. 4. The box of motor units according to claim 1, characterized in that the KDA is equipped with motor units mounted on the case and the cover of the box, variably communicated by torque through the central control gear with the RVD shaft by means of multi-stage gearboxes of drive units mounted in the internal volume of the KDA with the formation in a standard the engine operating mode of two groups of multi-stage gearboxes connected to a spur gear on the input shaft of the rotary gearbox with the formation of branching gear stages with the possibility of In this case, the first group of gearboxes of drive units includes a two-stage gearbox for a regulator pump, three-speed gearboxes for a breather of a centrifugal and plunger pump, five-speed gearboxes for two units - a motorized centrifugal pump and oil unit, with a sequence of common gear ratios for each of the multi-stage gearboxes drives of the mentioned motor units of the first group within the KDA, counting from a cylindrical track , Determined in the ranges of ratios and the input shaft drive gear KDA (i _r.v. = i _ckp ): i _ccp. : i _nr : i _cs : i _np : i _dtsn. : i _ma = (1.01 ÷ 1.43) :( 0.71 ÷ 0.99) :( 0.37 ÷ 0.53) :( 0.77 ÷ 0.99) :( 0.26 ÷ 0 , 36) :( 0.45 ÷ 0.64) :( 0.45 ÷ 0.64), where (i _r.v. = i _ccc ) ^_ gear ratio at the input of torque input to the KDA equal to the gear ratio of the _{central control} gear; i _gkp. - the same, the main conical gear pair of KDA; i _nr - the same, gear pump regulator; i _cs - the same as a centrifugal prompter gearbox; i _np - the same, gear pump plunger; i _{dtsn ..} - the same gear motor centrifugal pump; i _ma - the same, gear unit; and the other group of gearboxes includes two-stage gearboxes of the afterburner pump and the VKA flexible torque transmission shaft, and the sequence of general gear ratios of each of the multi-stage gearboxes of the drives of the mentioned motor units of the second group within the KDA, counting from the cylindrical wheel on the input shaft of the gearbox of the KDA drive gearbox, is defined in the ranges ratios (i _r.v. = i _ckp ): i _nf : i _gv = (1.01 ÷ 1.43) :( 0.71 ÷ 0.99) :( 1.73 ÷ 2.44) :( 0, 59 ÷ 0.83), where (i _r.v. = i _ccc ) is the gear ratio on the input spring of torque in the KDA equal to the gear ratio of the _{central control} gear; i _nf - the same as a boost pump gearbox; i _guards - the same as a flexible shaft gearbox. 5. The box of motor units according to claim 1, characterized in that the contact ends of the body and the lid of the box are provided with flanges of detachable connection with holes, for at least three types of elements - centering, mounting and dismounting with an excess of the number of the second relative to the first not less than eight times. 6. The box of motor units according to claim 1, characterized in that the generatrix of the cylindrical surface of the body and cover of the KDA is parallel to the axis of the shaft of the high pressure hoses. 7. The housing of the KDA turbofan engine of a twin-shaft twin-circuit turbojet engine having a housing and a two-stage low and high pressure compressor with a power intermediate housing, characterized in that it is made in the form of a three-dimensional closed longitudinally curved shell forming an extended spatial body with a convex back and a concave facing the engine body part of the side wall of the housing with a curvature adapted to the curvature of the engine housing, and the KDA includes two volumetric shell-shaped parts - with the case and the cover are made with a step-like flat bottom and cylindrical walls of variable curvature, while the contact ends of the case and the cover of the box are equipped with detachable flanges with holes for at least three types of functional mounting and dismounting elements - centering, mounting and dismounting with an excess of quantity fasteners relative to the centering or dismantling (8 ÷ 11) times, moreover, the KDA housing is saddle-mounted on the upper part of the intermediate engine housing and is equipped with the ends and in the concave part with external fasteners to the intermediate engine casing, and the bottom of the KDA housing is made frontally oriented in the direction of flight (n.p.) and parallel to the plane of the connector of the KDA flanges, while an opening for entry is made in the concave part of the side wall of the KDA housing torque through the spring connecting the drive wheel of the main gear conical pair of KDA with the driven conical wheel of the CCP, in addition, the bottom of the housing of the KDA is made containing openings for mounting engine assemblies, including a cent a reliable breather, a plunger pump, a motor centrifugal pump and a flexible shaft drive for transmitting torque to the units of the remote box of aircraft units (RCA), and the bottom of the KDA cover is made with openings for mounting engine units, including an oil unit, a pump regulator and an afterburner moreover, at least the openings in the KDA box for the installation of motor units are provided around the perimeter with annular stiffeners with a height exceeding the shell shell thickness by at least three times, while but the housing and the cover and the housing of the KDA is made containing a set of protruding radial stiffeners protruding into the housing with an excess above the shell of at least one and a half thicknesses of the latter, in addition, the bottom of the cover of the KDA is made containing facing at least one set of intersecting radially circular concentrically spaced stiffeners with an excess above the shell also comprising at least one and a half shell thickness. 8. KDA housing according to claim 7, characterized in that in the bottom of the housing and cover of the KDA there are made at least three openings for the intermediate gear shafts of the gearboxes of the motor units. 9. KDA housing according to claim 7, characterized in that at least a part of the intersections of the radial and circular ribs are made in the KDA cover with boss tides with holes for fasteners for the flange connection of the pump-regulator. 10. The main bevel gear of the KDA of a twin-shaft twin-circuit turbojet engine having a housing and gas-dynamically interconnected coaxial shafts of the HPH, RND and a central bevel gear, characterized in that it is located in the housing of the KDA with mounting places for the assembly units of the KDA and includes mounted with the connection to the indicated locations of the main bevel gear pair of KDA of orthogonally oriented bevel gears and driven gears, while the drive gear has a bevel gear a crown made with an angular frequency γ _{1 of the} teeth Z ₁ defined in the range γ ₁ = (3.34 ÷ 4.78) [units / rad], and the counter gear ring of the driven wheel is made with an angular frequency γ _{2 of the} teeth Z ₂ , which is defined in the range γ ₂ = (3.98 ÷ 5.74) [units / rad], and the main gear pair of the driving and driven gears of the GKP KDA is made with a gear ratio i _{1, gp} , defined in the range i _{1, gp} = (0.71 ÷ 0.99), while the drive gear of the main bevel gear pair GKP KDA has a hub integrated into the pin of the pinion shaft, and the shaft is installed in a non-thrust ball and roller bearings, the last of which is made with rolling bodies supported directly on the shaft end, and the outer ring of the roller bearing is installed in the housing of the latter, made together with the cage of the driving bevel gear, which is extended until the ball bearing is attached to the housing, the bevel gear is mounted on the input shaft of the KDA with two bearings - a thrust ball bearing mounted on the shaft end on the driven side eights Wheels, and the supporting roller bearing mounted on the trailer of the opposite shaft, wherein the driven bevel wheel is detachably fixed to the neck of the shaft to form the intermediate flange by means of fastening elements mounted in aligned bores of the flange and the wheel with angular frequency γ _otv> 0.79 [units / rad ], in addition, on the section of the input shaft of the KDA between the roller bearing and the conical driven wheel, a cylindrical gear wheel is mounted together with it, the drive gear for all gearboxes of the KDA in the mode of operation of the rotor motor of the HPC, having a lawsuit with a rim, the gear rim of which is made with an angular frequency γ _{c. 1 of} teeth Z _{c. 1} , defined in the range of γ _c. 1 = (2.87 ÷ 4.30) [units / rad], as well as a web turning into a hub integrated with the neck of the shaft within the wall thickness of the latter. 11. The main bevel gear according to claim 10, characterized in that the leading gear conical wheel of the hydraulic control gear with roller and thrust ball bearings are mounted in a cage having a small cylindrical end portion with the function of a roller bearing housing, covering the outer and outer ends the ring of the roller bearing and passing into the conical section of the cage, conjugated, in turn, with an expanded cylindrical section, while in the mating zone of the conical and cylindrical sections along the height of the cage and in the angular contact range of the teeth of the gears in the casing shell, an aperture with an angular target is made in the projection onto a plane normal to the axis of the driving bevel wheel, sufficient to expose at least six teeth of the driven conical wheel of the HCP, in addition, the cylindrical section of the holder is provided with a flange conjugated by means of detachable elements on the outside with the flange of the housing KDA and on the inside with the flange of the ring holder of the ball bearing housing. 12. The main bevel gear of the main bevel gear of the KDA of the twin-shaft twin-circuit turbojet engine having a housing and gas-dynamically interconnected coaxial shafts of the HPH, RND and TsKP, characterized in that it enters into the main bevel gear pair of the gas-turbine engine of the KDA, includes a hollow shaft made integrally with a wheel disk having a conical rim with a ring gear, a web containing a conditional middle conical surface and an axially developed hollow cylindrical hub integrated in the middle the axial section of the shaft, simultaneously endowed with the function of the support pin, and equipped with slots on the inside of the shaft with the formation of a seat for the spline end of the drive spring, which transmits torque through the driven wheel of the main gear pair to the engine KDA units, while the drive shaft ends, upper and lower facing the axis of the RVD shaft, are provided with external seats located on both sides of the wheel disk, respectively, under the ball and roller bearings, and the drive wheel has a conical minutes toothing, angular frequency γ ₁ teeth Z ₁ is defined in the range of γ ₁ = (3,34 ÷ 4,78) [U / rad], and the teeth of the crown are made variable height which decreases toward the axial vertex of the conditioned tooth top cone with gradient G ₁ defined in the range G ₁ = (N _{z1, max} -N _{z1, min} ) / B _z1 = (0.14 ÷ 0.20) [m / m], where H _{z1, max} - the highest height of the involute part of the lateral surface at the outer peripheral end of the tooth in projection onto the conditional axial plane passing through the midpoint of the tooth apex; H _{z1, min} - the same, the smallest height of the involute part of the lateral surface of the tooth at the inner end of the latter; In _s1 - the width of the tooth in the same projection; the angle α _{o.d.k1 of} inclination of the generatrix of the conditional dividing cone of the _ring gear to the axis of the drive wheel shaft is defined in the range α _o.d.k = (0.59 ÷ 0.85) [rad], and the ring gear of the drive wheel is made with teeth of a circular configuration with a radius R _{kr. 1 of the} curvature of the tooth apex in projection onto a plane normal to the axis of the shaft of the drive wheel, scalarly exceeding the average tooth height _{Hz 1, cf.} N ₁ times, where N _{1 is} defined in the range N ₁ = (R _cr1 / H _{s1, cp.} ) = (8.1 ÷ 12.1), and the angle of the spiral β _W1 , expressed in the same projection as the angle between the tangent to the tooth line at the midpoint of the last and the radius of the same point drawn from the axis of the shaft of the drive wheel, is optionally defined in the range of values β _W2 = (0.21 ÷ 0, 32) [too happy]. 13. Driving bevel gear according to claim 12, characterized in that the upper end of the shaft of the wheel is made with the possibility of direct support on its side surface of the rolling elements of the roller bearing, fenced from the outside by the outer ring of the latter. 14. Driving bevel gear according to claim 12, characterized in that the angle α _o.k.ver. the inclination of the generatrix of the initial cone of the tops of the teeth relative to the axis of the drive wheel is determined in the range of values α _o.c.ver. = (0.65 ÷ 0.92) [rad] and is made exceeding a similar angle α _o.c.p. the slope of the generatrix of the conditional cone of the troughs, which, in compliance with the specified condition, is determined in the range of values of α _b.p. = (0.50 ÷ 0.76) [rad]. 15. Driven bevel gear of the main bevel gear KDA of a twin-shaft twin-circuit turbojet engine having a housing and gas-dynamically interconnected coaxial shafts RVD, RND and TsKP, characterized in that it enters the main bevel gear pair GKP KDA, contains a disk having a rim with a bevel a gear rim, a sheet of minimum radial height, variable in thickness height and with an external lateral surface that is conical, and a hub, while recesses are made in the sheet according to the number of holes TIFA fasteners for releasably connecting the input shaft with the flange KDA installed in aligned bores of the flange and the wheel with angular frequency γ _otv> 0.79 [units / rad] formed between the recesses stiffening ribs taper type buttresses connecting the rim to the hub disc moreover, the bevel gear of the driven wheel is made with an angular frequency of γ ₂ teeth Z ₂ , which is defined in the range of γ ₂ = (3.98 ÷ 5.74) [units / rad], in addition, the driven wheel is endowed with an inner cylindrical landing and end thrust places for thrust about placing the wheel on the input shaft of the KDA, while the cylindrical seat of the hub of the drive of the driven conical wheel is made coaxial to the specified shaft, and the teeth of the conical crown of the driven wheel are made of variable height, decreasing towards the axial vertex of the conditional cone of the tops of the teeth with a gradient of G ₂ defined in the range G ₂ = (N _{z2, max} -N _{z2, min} ) / B _z2 = (0.17 ÷ 0.24) [m / m], where H _{z2, max} - the highest height at the outer peripheral end of the tooth of the wheel in projection on the conditional axial plane passing through the midpoint of the top of the tooth; H _{2, min} - the same, the smallest tooth height at the inner end of the latter; In _z2 - the width of the tooth in the same projection; the angle α _{o.d.k2 of} inclination of the generatrix of the conditional dividing cone of the _ring gear to the shaft axis the driven wheel is defined in the range α _o.d.k2 = (0.74 ÷ 1.04) [rad], in addition, the gear ring of the driven wheel is made with circular teeth of radius R _kr.2 circular configuration of the top of the tooth in the projection onto the plane normal to the axis of the shaft of the driven wheel, scalar exceeding the average tooth height N _{s2, cf.} N ₂ times, where N _{2 is} defined in the range N ₂ = (R _cr2 / H _{s2, cp.} ) = (8.2 ÷ 12.3), and the angle of the spiral β _W2 , expressed in the same projection as the angle between the tangent to the tooth line to the midpoint and the radius of the same point drawn from the axis of the shaft of the driven wheel, is optionally defined in the range of values β _W2 = (0.21 ÷ 0.32 ) [glad]. 16. The input shaft KDA of a twin-shaft double-circuit turbojet engine having a housing and gas-dynamically interconnected coaxial shafts RVD, RND and TsKP, characterized in that it is hollow, equipped with seats for a thrust roller bearing at one end and a thrust ball bearing on the opposite end, in addition, the KDA input shaft is endowed with a seat for the placement of the driven bevel wheel of the main gear pair GKP KDA and has an adjoining one made integrally with the annular shaft flange which is provided with openings for the fasteners detachably connected to the driven wheel, spaced perimeter flange having an angular frequency γ _otv> 0.79 [units / rad] In addition, the area of the input shaft KDA between the roller bearing and the conical flange of the driven wheel formed a cylindrical gear wheel, driven by all KDA gearboxes, having a disk with a rim, a gear rim of which is made with an angular frequency γ _{c. 1} teeth Z _c . 1 defined in the range γ _c. 1 = (2,87 ÷ 4, 30) [units / rad], as well as having a canvas, passing in its hub integrated with the neck of the shaft within the wall thickness of the latter, and receiving the torque from the rotor shaft ARCs in engine operation.

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