CN110107667B - Turbine engine accessory transmission mechanism, use method thereof and turbine engine - Google Patents
Turbine engine accessory transmission mechanism, use method thereof and turbine engine Download PDFInfo
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- CN110107667B CN110107667B CN201910348133.0A CN201910348133A CN110107667B CN 110107667 B CN110107667 B CN 110107667B CN 201910348133 A CN201910348133 A CN 201910348133A CN 110107667 B CN110107667 B CN 110107667B
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- transmission assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/36—Power transmission arrangements between the different shafts of the gas turbine plant, or between the gas-turbine plant and the power user
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D9/00—Couplings with safety member for disconnecting, e.g. breaking or melting member
- F16D9/06—Couplings with safety member for disconnecting, e.g. breaking or melting member by breaking due to shear stress
- F16D9/08—Couplings with safety member for disconnecting, e.g. breaking or melting member by breaking due to shear stress over a single area encircling the axis of rotation, e.g. shear necks on shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H35/00—Gearings or mechanisms with other special functional features
- F16H35/10—Arrangements or devices for absorbing overload or preventing damage by overload
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses a turbine engine accessory transmission mechanism and a using method thereof and a turbine engine, wherein the turbine engine accessory transmission mechanism comprises: a spline shaft and a connecting pipe fitting; the shaft body of the spline shaft is provided with a shaft neck structure, the shaft neck structure does not buckle when the accessory transmission assembly is clamped, and the strength of the spline shaft is lower than that of the transmission part of the central transmission assembly and that of the accessory transmission assembly. According to the turbine engine accessory transmission mechanism, the central transmission gear is connected with the accessory transmission gear through the spline shaft, the shaft neck structure is designed on the spline shaft, the strength of the spline shaft is designed to be the lowest in the central transmission assembly and the accessory transmission assembly, the spline shaft is guaranteed to be twisted off when clamping occurs, parts in the central transmission assembly and the accessory transmission assembly are protected, the spline shaft is formed by machining a bar stock, raw materials are relatively cheaper, machining is simpler, and fault loss is effectively reduced.
Description
Technical Field
The invention relates to the field of turbine engines, in particular to a turbine engine accessory transmission mechanism. In addition, the invention also relates to a using method of the turbine engine accessory transmission mechanism and a turbine engine.
Background
The integration degree of the cartridge receiver on the aeroengine is continuously increased along with the improvement of the manufacturing level, so that cartridge receiver parts become more and more complex, the states of internal parts of the engine are required to be checked in the engine assembling process and after the engine is subjected to test run, and fault parts are required to be replaced when faults occur, therefore, the cartridge receiver parts are more complicated in the engine assembling and disassembling process, and the operation time is longer. When an accessory on an aircraft engine extracts power from an engine main shaft, the power needs to be extracted through a gear transmission chain in an accessory transmission device. The accessory drive consists of a central drive component and an accessory drive component. The central drive assembly includes a central drive gear and the accessory drive assembly includes an accessory drive gear. The accessory drive typically draws power through a central drive gear and transfers it through a gear train to the accessory drive gears and ultimately to the various accessories. When the rotor on the gear transmission chain is damaged and the like, which causes the clamping of the rotor, the gear is broken, and further the bearing on the gear shaft is damaged, thereby increasing unnecessary economic loss.
Disclosure of Invention
The invention provides a turbine engine accessory transmission mechanism, a using method thereof and a turbine engine, and aims to solve the technical problem that when an existing accessory transmission device breaks down, rotor parts such as gears or bearings are damaged.
The technical scheme adopted by the invention is as follows:
a turbine engine accessory drive mechanism between a central drive assembly and an accessory drive assembly for transferring torque, the central drive assembly having a central drive gear therein and the accessory drive assembly having an accessory drive gear therein, the turbine engine accessory drive mechanism comprising: the connecting pipe fitting is arranged between the central transmission gear and the accessory transmission gear and used for transmitting torque between the central transmission gear and the accessory transmission gear, and the connecting pipe fitting is arranged between the central transmission assembly and the accessory transmission assembly and surrounds the outside of the spline shaft to form a protective layer so as to prevent internal parts from being broken and splashing outwards; the shaft body of the spline shaft is provided with a shaft neck structure, the shaft neck structure does not buckle when the accessory transmission assembly is clamped, and the strength of the spline shaft is lower than that of the transmission part of the central transmission assembly and that of the accessory transmission assembly.
Further, the length of the connecting pipe fitting is more than 30 mm; the connecting pipe fitting is detachably connected with the central transmission assembly and the accessory transmission assembly; the axial length of the connecting pipe fitting is adjustable.
Furthermore, the connecting pipe fitting comprises a first pipe body and a second pipe body, and the first pipe body and the second pipe body are connected in an embedded mode; the free end of the first pipe body is in inserting fit with the groove structure of the accessory transmission assembly, and the first pipe body is provided with a limiting piece which is used for positioning the end part of the groove of the accessory transmission assembly and limiting the first pipe body to move axially along the direction of the accessory transmission assembly; the free end of the second pipe body is in inserting fit with the groove structure of the central transmission assembly.
Furthermore, a positioning part for axially positioning the first pipe body to prevent the first pipe body from separating from the accessory transmission assembly and the second pipe body from separating from the central transmission assembly is arranged on the first pipe body; or a positioning part for axially positioning the second pipe body to prevent the first pipe body from separating from the accessory transmission assembly and the second pipe body from separating from the central transmission assembly is arranged on the second pipe body; or, the first pipe body and the second pipe body are respectively provided with a positioning part for axially positioning the first pipe body and the second pipe body so as to prevent the first pipe body from separating from the accessory transmission assembly and the second pipe body from separating from the central transmission assembly.
Further, the distance between the central transmission component and the accessory transmission component is A, the length of the first pipe body is B, the length of the second pipe body is C, and A is greater than B and A is greater than C.
Further, C > B +5 mm.
Furthermore, sealing rings or sealing gaskets for sealing the joint parts are arranged at the joint parts between the first pipe body and the accessory transmission assembly, between the second pipe body and the central transmission assembly and between the first pipe body and the second pipe body.
Furthermore, the turbine engine accessory transmission mechanism also comprises a first plugging piece which is arranged in the central transmission gear and used for limiting the axial movement of the spline shaft and preventing the spline shaft from entering the inside of the casing after being broken, and a second plugging piece which is arranged in the accessory transmission gear and used for limiting the axial movement of the spline shaft and preventing the spline shaft from entering the inside of the casing after being broken; and a sealing ring or a sealing gasket for sealing the joint part is arranged at the joint part between the second plugging piece and the accessory transmission gear.
According to another aspect of the invention, a method for using the turbine engine accessory transmission mechanism is also provided, and by adopting the turbine engine accessory transmission mechanism,
s1: the central transmission component, the connecting pipe fitting and the accessory transmission component are sequentially arranged along the axial direction;
s2: the central transmission gear is arranged in the central transmission assembly, and the accessory transmission gear is arranged in the accessory transmission assembly;
s3: the spline shaft sequentially passes through the middle shaft hole of the central transmission gear, the inner cavity of the connecting pipe fitting and the middle shaft hole of the accessory transmission gear, and splines at two ends of the spline shaft are respectively connected with an internal spline of the middle shaft hole of the central transmission gear and an internal spline of the middle shaft hole of the accessory transmission gear;
s4: and the connecting pipe fitting is fixedly positioned between the central transmission assembly and the accessory transmission assembly, one end of the connecting pipe fitting is installed in the groove of the central transmission assembly, and the other end of the connecting pipe fitting is installed in the groove of the accessory transmission assembly to finish installation.
Further, after the step of S3, the method further includes: and (5) plugging, fixing and positioning two ends of the spline shaft.
According to another aspect of the invention, there is also provided a turbine engine including the turbine engine accessory drive mechanism described above.
The invention has the following beneficial effects:
the invention relates to a turbine engine accessory transmission mechanism, which comprises a spline shaft and a connecting pipe fitting, wherein a central transmission gear is connected with an accessory transmission gear through the spline shaft, the central transmission assembly and the accessory transmission assembly are connected through the connecting pipe fitting and surround the outside of the spline shaft, a shaft neck structure is designed on the spline shaft, the strength of the spline shaft is designed to be the lowest in the transmission part of the central transmission assembly and the transmission part of the accessory transmission assembly through early-stage preliminary experiments and calculation, but the spline shaft cannot yield when being clamped. The epaxial axle journal structural design of integral key guarantees when taking place the card system, through the twist-off integral key shaft, protects the part in central authorities' drive assembly and the annex drive assembly, and in addition, the integral key shaft is bar machine-shaping, and raw and other materials are cheaper relatively, and processing is also simpler, effectively reduces the fault loss. The connecting pipe fitting is sleeved outside the spline shaft, so that on one hand, the spline shaft is convenient to check and replace, and the internal parts are effectively prevented from being broken and splashing outwards; on the other hand, the connecting pipe fitting can be detachably connected between the central transmission assembly and the accessory transmission assembly, so that the states of internal parts of the central transmission assembly and the accessory transmission assembly can be conveniently observed, part of parts can be replaced, and the integral structure of the central transmission assembly and the accessory transmission assembly is prevented from being detached. The turbine engine accessory transmission mechanism is simple in structure and convenient to operate, the spline shaft is guaranteed to be broken when a fault occurs, other engine parts are not damaged, fault loss is reduced, the connecting pipe fitting prevents internal parts from being broken and splashing, the inspection of the engine and the replacement work of the parts are greatly simplified, and the working efficiency is improved.
The application method of the turbine engine accessory transmission mechanism is convenient to install and operate, and the whole turbine engine accessory transmission mechanism realizes the functions by utilizing the structure of the base body, so that the structure is simple, the manufacturing cost is low, and the mass production is easy.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic illustration of a turbine engine accessory drive of a preferred embodiment of the present invention in an installed condition;
FIG. 2 is a schematic illustration of a turbine engine accessory drive train installation process in accordance with a preferred embodiment of the present invention;
FIG. 3 is a schematic view of the assembly of the central drive gear and the accessory drive gear of the preferred embodiment of the present invention; and
fig. 4 is a schematic view of the assembly of the first tube and the second tube according to the preferred embodiment of the present invention.
Description of reference numerals:
1. a central drive assembly; 2. an accessory drive assembly; 3. a central drive gear; 4. an accessory drive gear; 5. a spline shaft; 51. A journal structure; 6. connecting pipe fittings; 61. a first pipe body; 611. a limiting member; 62. a second tube body; 63. a positioning member; 7. a first blocking member; 8. a second closure.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
FIG. 1 is a schematic illustration of a turbine engine accessory drive of a preferred embodiment of the present invention in an installed condition; FIG. 2 is a schematic illustration of a turbine engine accessory drive train installation process in accordance with a preferred embodiment of the present invention; FIG. 3 is a schematic view of the assembly of the central drive gear and the accessory drive gear of the preferred embodiment of the present invention; fig. 4 is a schematic view of the assembly of the first tube and the second tube according to the preferred embodiment of the present invention.
As shown in fig. 1 and 2, the turbine engine accessory transmission mechanism of the present embodiment is disposed between a central transmission assembly 1 and an accessory transmission assembly 2 for transmitting torque, the central transmission assembly 1 includes a central transmission gear 3, the accessory transmission assembly 2 includes an accessory transmission gear 4, and the turbine engine accessory transmission mechanism includes: a spline shaft 5 arranged between the central transmission gear 3 and the accessory transmission gear 4 for transmitting torque between the central transmission gear 3 and the accessory transmission gear 4, and a connecting pipe 6 arranged between the central transmission assembly 1 and the accessory transmission assembly 2 and surrounding the spline shaft 5 for forming a protective layer to prevent internal parts from being broken and splashing outwards; the shaft body of the spline shaft 5 is provided with a shaft neck structure 51, the shaft neck structure 51 does not bend when the accessory drive assembly 2 is clamped, and the strength of the spline shaft 5 is lower than that of the drive part of the central drive assembly 1 and that of the drive part of the accessory drive assembly 2. The invention relates to a turbine engine accessory transmission mechanism, which comprises a spline shaft 5 and a connecting pipe fitting 6, wherein a central transmission gear 3 is connected with an accessory transmission gear 4 through the spline shaft 5, a central transmission assembly 1 and an accessory transmission assembly 2 are connected through the connecting pipe fitting 6 and surround the outside of the spline shaft 5, a shaft neck structure 51 is designed on the spline shaft 5, through preliminary experiments and calculation in the early stage, the strength of the spline shaft 5 is designed to be the lowest between the transmission part of the central transmission assembly 1 and the transmission part of the accessory transmission assembly 2, but when clamping occurs, the spline shaft 5 cannot generate yielding strength. The design of the shaft neck structure 51 on the spline shaft 5 ensures that parts in the central transmission assembly 1 and the accessory transmission assembly 2 are protected by twisting off the spline shaft 5 when the clamping occurs, in addition, the spline shaft 5 is formed by bar machining, raw materials are relatively cheaper, the machining is simpler, and the fault loss is effectively reduced. The connecting pipe fitting 6 is sleeved outside the spline shaft 5, so that on one hand, the spline shaft 5 is convenient to check and replace, and the internal parts are effectively prevented from being broken and splashing outwards; on the other hand, connect pipe fitting 6 and can dismantle the connection between central drive assembly 1 and annex drive assembly 2, conveniently observe the state of central drive assembly 1 and annex drive assembly 2 internals to can realize the change of part, avoid dismantling the overall structure of central drive assembly 1 and annex drive assembly 2. Turbine engine annex drive mechanism simple structure, convenient operation, integral key shaft 5 guarantee when the trouble takes place, integral key shaft 5 fracture, and other engine parts do not take place to damage, reduce the fault loss, connect pipe fitting 6 and prevent that the internals fracture from and splashing to simplify the inspection of engine and the change work of part greatly, improve work efficiency.
The above-described journal structures 51 of the spline shaft 5 are arranged in two groups for preventing one of the groups from failing. Preferably, both ends of the spline shaft 5 are tapered to form a taper fit, so that the spline shaft can be conveniently positioned and centered during assembly. Preferably, the outer end of the spline shaft 5 is beveled to form a tapered fit, which helps to center the spline during assembly.
In this embodiment, the length of the connecting pipe member 6 is greater than 30 mm. The length of the connecting pipe fitting 6 is more than 30mm, and on one hand, the connecting pipe fitting is arranged between the central transmission component 1 and the accessory transmission component 2 to meet the requirements of installation conditions; on the other hand, it is convenient to design or install structures or components on the connecting tube 6 that assist in positioning and slip prevention. The connecting tube 6 is detachably connected to the central drive assembly 1 and the accessory drive assembly 2. The connecting pipe fitting 6 is detachably connected with the central transmission assembly 1 and the accessory transmission assembly 2, so that the installation and the replacement of the spline shaft 5 and other parts of the connecting pipe fitting 6 are facilitated. Preferably, the axial length of the connecting tube 6 is adjustable. On one hand, the connecting pipe fitting can adapt to different distances between the central transmission assembly 1 and the accessory transmission assembly 2, the application range of the connecting pipe fitting 6 is expanded, and the replacement of the connecting pipe fitting 6 is reduced; on the other hand, through the axial length of adjusting the connecting pipe fitting 6, the state of the internal parts of the central transmission component 1 and the accessory transmission component 2 is conveniently observed, the replacement of partial parts can be realized, and an observation hole or an observation window is not required to be additionally arranged.
As shown in fig. 1 and 4, in the present embodiment, the connecting pipe member 6 includes a first pipe body 61 and a second pipe body 62, and the first pipe body 61 is connected to the second pipe body 62 in a nested manner. The free end of the first pipe 61 is inserted into the groove structure of the accessory drive component 2, and the first pipe 61 is provided with a position-limiting member 611 for positioning with the groove end of the accessory drive component 2 and limiting the axial movement of the first pipe 61 along the accessory drive component 2. The free end of the second tube 62 is in plug-in fit with the groove structure of the central transmission assembly 1. The connecting pipe member 6 includes a first pipe 61 and a second pipe 62, and the first pipe 61 and the second pipe 62 are connected in a nested manner so as to slide relative to each other, but it is ensured that the first pipe 61 and the second pipe 62 cannot be separated from each other. The first pipe body 61 is matched with the accessory transmission component 2, the free end of the first pipe body 61 seals the groove of the accessory transmission component 2, the second pipe body 62 is matched with the central transmission component 1, and the free end of the second pipe body 62 seals the groove of the central transmission component 1 to form a closed structure, so that the interference of the external environment is effectively prevented, and the service life of an engine is prolonged. The recess of the accessory drive assembly 2 or the recess of the central drive assembly 1 may be stepped. The first tube 61 and the second tube 62 are telescopically nested and connected, and further the axial length is adjusted. Optionally, the radial dimension of the first tube 61 is greater than the radial dimension of the second tube 62; the sleeving part of the first pipe body 61 and the second pipe body 62 is provided with a plurality of groups of O-shaped sealing rings, so that the sealing and connection stabilizing effects are achieved, the stable sliding connection is facilitated, and the loosening is avoided. The radial dimension of the nested connection site of the first tube 61 may be larger than that of the nested connection site of the second tube 62, that is, the radial dimension at the nested connection site is different; the radial sizes of other parts are the same; the nesting position also forms a limit structure for adjusting the axial length. The radial dimension of the first tube 61 and the radial dimension of the second tube 62 are designed according to the central transmission assembly 1 and the accessory transmission assembly 2, and the design forms are multiform so as to adapt to different structural requirements of the central transmission assembly 1 and the accessory transmission assembly 2. The limiting part 611 can adopt a limiting boss, a limiting block and a limiting strip, and the accessory transmission assembly 2 is excessively extruded when the first pipe body 61 is prevented from axially moving, so that the accessory transmission assembly 2 is damaged. The limiting member 611 can also be used as a holding member, and the first tube 61 can move toward the accessory drive assembly 2 along the axial direction by an external force acting on the limiting member 611. Preferably, the first and second tubular bodies 61, 62 are further provided with positioning rings for mounting in position between the first tubular body 6 and the accessory drive assembly 2, and between the central drive assembly 1 of the second tubular body 62.
As shown in fig. 1 and 4, in the present embodiment, the first tube 61 is provided with a positioning member 63 for axially positioning the first tube 61 to prevent the first tube 61 from being separated from the accessory drive assembly 2 and the second tube 62 from being separated from the central drive assembly 1; or, the second tube 62 is provided with a positioning member 63 for axially positioning the second tube 62 to prevent the first tube 61 from separating from the accessory drive assembly 2 and the second tube 62 from separating from the central drive assembly 1; alternatively, the first tube 61 and the second tube 62 are provided with positioning members 63 for axially positioning the first tube 61 and the second tube 62 to prevent the first tube 61 and the second tube 62 from being separated from the accessory drive assembly 2 and the central drive assembly 1. Above-mentioned setting element 63 is with first body 61 and second body 62 axial positioning, and setting element 63 can adopt and set up the recess that holds the retaining ring on first body 61 or second body 62, and the installation specifically is: install central drive gear 3 in central drive subassembly 1, install annex drive gear 4 in annex drive subassembly 2, first body 61 is nested with second body 62, with the retaining ring cover on second body 62, the retaining ring does not get into the recess of second body 62 this moment, do not fix a position promptly, with first body 61 along annex drive subassembly 2 direction axial motion, get into the groove structure of annex drive subassembly 2, the first body 61 stop motion of locating part 611 to groove tip, second body 62 is along central drive subassembly 1 direction axial motion, move to the groove structure of central drive subassembly 1 in, block the retaining ring in the recess on second body 62.
In the present embodiment, as shown in fig. 1, the distance between the central transmission assembly 1 and the accessory transmission assembly 2 is a, the length of the first tube 61 is B, the length of the second tube 62 is C, a > B and a > C. The first tube 61 and the second tube 62 are sleeved and slid with each other and are installed between the central transmission assembly 1 and the accessory transmission assembly 2.
In this example, C > B +5 mm. The length of the second pipe body 62 is greater than that of the first pipe body 61, so that on one hand, the first pipe body 61 and the second pipe body 62 are nested between the central transmission component 1 and the accessory transmission component 2, and the first pipe body 61 and the second pipe body 62 are prevented from being separated; on the other hand, the positioning member 63 is pre-installed on the second tube 62, and the positioning member 63 is precisely positioned after the first tube 61 and the second tube 62 are axially installed in place.
In this embodiment, the joint portions between the first pipe 61 and the accessory drive assembly 2, between the second pipe 62 and the central drive assembly 1, and between the first pipe 61 and the second pipe 62 are provided with seal rings or gaskets for sealing the joint portions. The arrangement of the sealing ring or the sealing gasket has a good sealing effect on the joint part, and ensures a closed environment in the working process of the turbine engine. The sealing rings or the sealing gaskets are arranged at intervals, so that the stability is improved, the positioning stability during immobility and the sliding stability of telescopic adjustment are improved. Preferably, the two opposite wall surfaces of the assembling part of the sealing ring or the sealing gasket are provided with grooves, and the sealing ring or the sealing gasket is clamped in the grooves of the two adjacent wall surfaces at the same time, so that the sealing ring or the sealing gasket can play a role in sealing, can play a role in positioning and can also play a role in buffering acting force. And, the sealing washer or sealed the pad increase the first body 61 and the annex transmission subassembly 2 between, the second body 62 and the central transmission subassembly 1 between the frictional force, further prevent that first body 61 and second body 62 are not hard up, improve work efficiency.
As shown in fig. 2 and 3, in the present embodiment, the turbine engine accessory drive mechanism further includes a first blocking member 7 disposed in the center drive gear 3 for restricting axial movement of the spline shaft 5 and preventing the spline shaft 5 from breaking and entering the inside of the casing, and a second blocking member 8 disposed in the accessory drive gear 4 for restricting axial movement of the spline shaft 5 and preventing the spline shaft 5 from breaking and entering the inside of the casing. And a sealing ring or a sealing gasket for sealing the joint part is arranged at the joint part between the second plugging piece 8 and the interior of the accessory transmission gear 4. The first blocking piece 7 and the second blocking piece 8 effectively prevent the spline shaft 5 from axially moving to cause separation from the central transmission gear 3 and the accessory transmission gear 4; on the other hand, when the spline shaft 5 is broken, fragments of the broken spline shaft 5 do not enter the inside of the casing of the turbine engine due to the plugging of the first and second plugging members 7 and 8. Above-mentioned first shutoff piece 7 or second shutoff piece 8 and 5 contact surfaces of integral key shaft are equipped with and 5 terminal surface complex trompils of integral key shaft or fluting, make things convenient for 5 installation accurate location of integral key shaft.
According to another aspect of the invention, a method for using the turbine engine accessory transmission mechanism is also provided, and by adopting the turbine engine accessory transmission mechanism,
s1: the central transmission component 1, the connecting pipe fitting 6 and the accessory transmission component 2 are sequentially arranged along the axial direction;
s2: the central transmission gear 3 is arranged in the central transmission component 1, and the accessory transmission gear 4 is arranged in the accessory transmission component 2;
s3: the spline shaft 5 sequentially passes through a middle shaft hole of the central transmission gear 3, an inner cavity of the connecting pipe fitting 6 and a middle shaft hole of the accessory transmission gear 4, and splines at two ends of the spline shaft 5 are respectively connected with an internal spline of the middle shaft hole of the central transmission gear 3 and an internal spline of the middle shaft hole of the accessory transmission gear 4;
s4: the connecting pipe fitting 6 is fixedly positioned between the central transmission component 1 and the accessory transmission component 2, one end of the connecting pipe fitting 6 is installed in the groove of the central transmission component 1, and the other end of the connecting pipe fitting 6 is installed in the groove of the accessory transmission component 2, so that installation is completed.
The application method of the turbine engine accessory transmission mechanism is convenient to install and operate, and the whole turbine engine accessory transmission mechanism realizes the functions by utilizing the structure of the base body, so that the structure is simple, the manufacturing cost is low, and the mass production is easy.
In this embodiment, after the step S3, the method further includes: and (5) plugging, fixing and positioning two ends of the spline shaft 5.
As shown in fig. 1, 2, 3 and 4, it is preferable that the first blocking piece 7 is installed in the center shaft hole of the center drive gear 3, the center drive gear 3 is installed in the center drive assembly 1, and the accessory drive gear 4 is installed in the accessory drive assembly 2; sequentially penetrating the spline shaft 5 through a middle shaft hole of the accessory transmission gear 4, an inner cavity of the connecting pipe fitting 6 and a middle shaft hole of the central transmission gear 3, moving to a first plugging piece 7, and installing a second plugging piece 8 with a sealing ring in the accessory transmission gear 4 to be in butt joint with the spline shaft 5; the length of the first tube body 61 is 15mm, the length of the second tube body 62 is 22mm, the diameter of the first tube body 61 is larger than that of the second tube body 62, the sealing rings are respectively arranged on the first tube body 61 at the joint part between the first tube body 61 and the accessory transmission component 2, the second tube body 62 at the joint part between the second tube body 62 and the central transmission component 1 and the second tube body 62 at the joint part between the first tube body 61 and the second tube body 62, the first tube body 61 and the second tube body 62 are sleeved, the baffle ring is pre-arranged on the second tube body 62, the first tube body 61 and the second tube body 62 which form nested connection are arranged between the central transmission component 1 and the accessory transmission component 2, the first tube body 61 axially moves along the direction of the accessory transmission component 2 and enters the groove structure of the accessory transmission component 2, the first tube body 61 from the limiting piece 611 to the end part of the groove stops moving, the second pipe body 62 axially moves along the direction of the central transmission assembly 1, moves into the groove structure of the central transmission assembly 1, and clamps the check ring into the groove on the second pipe body 62 to form the axial positioning of the first pipe body 61 and the second pipe body 62, thereby completing the installation of the turbine engine accessory transmission mechanism.
According to another aspect of the invention, there is also provided a turbine engine including the turbine engine accessory drive mechanism described above. The turbine engine provided by the invention is stable in work and convenient to maintain, and can meet the accessibility requirement of the transmission part of the engine accessory.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A turbine engine accessory drive mechanism between a central drive assembly (1) and an accessory drive assembly (2) for transferring torque, the central drive assembly (1) containing a central drive gear (3) and the accessory drive assembly (2) containing an accessory drive gear (4),
the turbine engine accessory drive mechanism includes:
a spline shaft (5) arranged between the central transmission gear (3) and the accessory transmission gear (4) and used for transmitting torque between the central transmission gear (3) and the accessory transmission gear (4), and a connecting pipe fitting (6) arranged between the central transmission assembly (1) and the accessory transmission assembly (2) and surrounding the spline shaft (5) to form a protective layer to prevent internal parts from being broken and splashing outwards; the length of the connecting pipe fitting (6) is more than 30mm, the connecting pipe fitting (6) is detachably connected with the central transmission component (1) and the accessory transmission component (2), and the axial length of the connecting pipe fitting (6) is adjustable;
the connecting pipe fitting (6) comprises a first pipe body (61) and a second pipe body (62), the first pipe body (61) is connected with the second pipe body (62) in a nested mode, the free end of the first pipe body (61) is in plug fit with a groove structure of the accessory transmission assembly (2), a limiting piece (611) used for being positioned with the end portion of the groove of the accessory transmission assembly (2) and limiting the axial movement of the first pipe body (61) along the direction of the accessory transmission assembly (2) is arranged on the first pipe body (61), and the free end of the second pipe body (62) is in plug fit with the groove structure of the central transmission assembly (1);
the distance between the central transmission assembly (1) and the accessory transmission assembly (2) is A, the length of the first tube (61) is B, the length of the second tube (62) is C, A > B and A > C, C > B +5 mm; a shaft neck structure (51) is arranged on the shaft body of the spline shaft (5), the shaft neck structure (51) does not bend when the accessory transmission assembly (2) is clamped, and the strength of the spline shaft (5) is lower than that of the transmission part of the central transmission assembly (1) and that of the transmission part of the accessory transmission assembly (2);
turbine engine annex drive mechanism still including laying be used for the restriction in central authorities drive gear (3) spline shaft (5) axial displacement prevents spline shaft (5) fracture back entering machine casket inside first shutoff piece (7) and laying be used for the restriction in annex drive gear (4) spline shaft (5) axial displacement prevents spline shaft (5) fracture back entering machine casket inside second shutoff piece (8), second shutoff piece (8) with joint portion between in annex drive gear (4) is equipped with and is used for the sealed sealing washer or the sealed pad in joint portion.
2. The turbine engine accessory drive mechanism of claim 1,
the first pipe body (61) is provided with a positioning part (63) which is used for axially positioning the first pipe body (61) so as to prevent the first pipe body (61) from being separated from the accessory transmission assembly (2) and prevent the second pipe body (62) from being separated from the central transmission assembly (1); or
The second pipe body (62) is provided with a positioning part (63) which is used for axially positioning the second pipe body (62) so as to prevent the first pipe body (61) from being separated from the accessory transmission assembly (2) and prevent the second pipe body (62) from being separated from the central transmission assembly (1); or
The first pipe body (61) and the second pipe body (62) are provided with positioning pieces (63) which are used for axially positioning the first pipe body (61) and the second pipe body (62) so as to prevent the first pipe body (61) from being separated from the accessory transmission assembly (2) and the second pipe body (62) from being separated from the central transmission assembly (1).
3. The turbine engine accessory drive mechanism of claim 1,
and sealing rings or sealing gaskets for sealing the joint parts are arranged at the joint parts between the first pipe body (61) and the accessory transmission component (2), between the second pipe body (62) and the central transmission component (1) and between the first pipe body (61) and the second pipe body (62).
4. A method of using a turbine engine accessory drive, characterized by using a turbine engine accessory drive according to any of claims 1 to 3,
s1: the central transmission component (1), the connecting pipe fitting (6) and the accessory transmission component (2) are sequentially arranged along the axial direction;
s2: a central transmission gear (3) is mounted in the central transmission assembly (1), and an accessory transmission gear (4) is mounted in the accessory transmission assembly (2);
s3: a spline shaft (5) sequentially penetrates through a middle shaft hole of the central transmission gear (3), an inner cavity of the connecting pipe fitting (6) and a middle shaft hole of the accessory transmission gear (4), and splines at two ends of the spline shaft (5) are respectively connected with an internal spline of the middle shaft hole of the central transmission gear (3) and an internal spline of the middle shaft hole of the accessory transmission gear (4);
s4: the connecting pipe fitting (6) is fixedly positioned between the central transmission assembly (1) and the accessory transmission assembly (2), one end of the connecting pipe fitting (6) is installed in a groove of the central transmission assembly (1), and the other end of the connecting pipe fitting (6) is installed in a groove of the accessory transmission assembly (2) to complete installation.
5. The method of using a turbine engine accessory drive mechanism of claim 4,
after the step of S3, the method further includes: and plugging, fixing and positioning the two ends of the spline shaft (5).
6. A turbine engine including a turbine engine accessory drive according to any one of claims 1 to 3.
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| CN201910348133.0A CN110107667B (en) | 2019-04-28 | 2019-04-28 | Turbine engine accessory transmission mechanism, use method thereof and turbine engine |
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| CN201910348133.0A CN110107667B (en) | 2019-04-28 | 2019-04-28 | Turbine engine accessory transmission mechanism, use method thereof and turbine engine |
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| CN110107667A CN110107667A (en) | 2019-08-09 |
| CN110107667B true CN110107667B (en) | 2021-05-07 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6058791A (en) * | 1998-03-19 | 2000-05-09 | Alliedsignal, Inc. | Accessory mechanical drive for a gas turbine engine |
| JP2003269192A (en) * | 2002-03-18 | 2003-09-25 | Ishikawajima Harima Heavy Ind Co Ltd | Bearing device of radial drive shaft for gas turbine engine |
| WO2010109486A1 (en) * | 2009-03-23 | 2010-09-30 | Steer Engineering Private Limited | A safety device in torque transmission system |
| ITTO20130636A1 (en) * | 2013-07-29 | 2015-01-30 | Avio Spa | TRANSMISSION BOX, AND DISASSEMBLY METHOD TO DISCONNECT A DRIVE SHAFT IN SUCH A TRANSMISSION BOX |
| CN205533821U (en) * | 2016-04-08 | 2016-08-31 | 新乡航空工业(集团)有限公司 | Connection structure of oil pump pump shaft and engine annex machine casket |
| EP3382164A1 (en) * | 2017-03-28 | 2018-10-03 | Ge Avio S.r.l. | Output assembly for an accessory gearbox of a gas turbine engine |
| CN108757761A (en) * | 2018-06-13 | 2018-11-06 | 中国北方发动机研究所(天津) | A kind of high-speed coupling with overload protection |
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