CN116576244A - Lubricating device for spline pair of accessory transmission gear box - Google Patents

Lubricating device for spline pair of accessory transmission gear box Download PDF

Info

Publication number
CN116576244A
CN116576244A CN202310323693.7A CN202310323693A CN116576244A CN 116576244 A CN116576244 A CN 116576244A CN 202310323693 A CN202310323693 A CN 202310323693A CN 116576244 A CN116576244 A CN 116576244A
Authority
CN
China
Prior art keywords
oil
hole
spline pair
gear shaft
accessory
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310323693.7A
Other languages
Chinese (zh)
Inventor
鲁锐
刘波
黄开明
陈希
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Aviation Powerplant Research Institute AECC
Original Assignee
Hunan Aviation Powerplant Research Institute AECC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hunan Aviation Powerplant Research Institute AECC filed Critical Hunan Aviation Powerplant Research Institute AECC
Priority to CN202310323693.7A priority Critical patent/CN116576244A/en
Publication of CN116576244A publication Critical patent/CN116576244A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0456—Lubrication by injection; Injection nozzles or tubes therefor
    • 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
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • 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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
    • 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
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02086—Measures for reducing size of gearbox, e.g. for creating a more compact transmission casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)

Abstract

The invention discloses a lubricating device for a spline pair of an accessory transmission gearbox, which comprises a box body, an oil conveying part and a gear shaft, wherein the oil conveying part comprises a spray hole, one end part of the gear shaft is provided with the spline pair, the end part of the gear shaft, which is far away from the spline pair, is provided with an accessory case, a bearing hole is arranged in the accessory case, and the bottom part of the bearing hole is provided with an oil collecting component; the bearing hole is provided with an inclined hole corresponding to the lubricating oil spray hole; the oil collecting assembly is of a double-fan-shaped combined transverse plate structure and comprises an oil collecting hole, an oil storage pipe and a step hole which are communicated, and the fan-shaped cylindrical surfaces at the upper end and the lower end of the oil collecting assembly are in small clearance fit with the bearing, so that the oil collecting assembly is convenient to assemble and disassemble and is prevented from loosening. The double fan-shaped cross plate structure of the oil collecting assembly ensures the function and simultaneously maximally reduces the structural weight. The high-rotation-speed spline pair of the device is sufficiently lubricated, so that the abrasion problem of the high-rotation-speed spline pair caused by insufficient lubrication can be effectively avoided, and the service life of the spline pair is prolonged.

Description

Lubricating device for spline pair of accessory transmission gear box
Technical Field
The invention relates to the technical field of spline pair lubricating devices, in particular to a lubricating device for an accessory transmission gear box spline pair.
Background
The accessory drive gearbox is a key component of the aeroengine, random accessories of the aeroengine such as a starting/generator, a lubricating oil pump, a pump regulator, a blower and the like are mounted on the accessory drive gearbox, and torque transmission is realized through external splines on the accessory drive shaft and internal spline connection of a gear shaft inside the accessory drive gearbox. Because of the relative fretting wear of spline engagement, lubrication issues of spline pairs need to be considered in the structural design.
The spline pair is usually arranged in the gear shaft, the two ends of the gear shaft are supported in the bearing holes of the accessory case by bearings, the current lubrication of the spline pair mainly adopts an oil mist lubrication mode, the bottom of the bearing hole of the accessory case at the corresponding end of the spline pair is provided with a vent hole, the vent hole is communicated with the inner cavity of the accessory transmission gear box, and when the accessory transmission gear box is in operation, oil mist in the inner cavity of the accessory transmission gear box enters the inner hole of the gear shaft through the vent hole, so that the purpose of lubricating the spline pair is achieved. The spline pair adopts the lubrication mode, has simple structure, and can achieve better effect under the condition that the rotating speed of the spline pair is not high (< 10000 r/min).
Along with the development of the aviation turboshaft engine towards the direction of high power ratio, the input rotation speed of the accessory transmission system is promoted to be continuously improved, and the accessory mounted on the aviation turboshaft engine is miniaturized and high-speed, so that the rotation speed of a spline pair connected with an accessory transmission gear shaft of the accessory is greatly improved, and the rotation speed of the spline pair can reach 30000r/min. If the high-rotation-speed spline pair still adopts an oil mist lubrication mode, the lubrication of the spline pair is insufficient, the spline pair can wear and even break a shaft after working for a long time under the environment, and flight accidents are caused.
Therefore, research on a spline pair lubricating device with high rotation speed has become a problem to be solved urgently for the transmission gearbox of the accessory of the current aeroengine.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a lubricating device for a spline pair of an accessory transmission gear box, which comprises a box body, an oil conveying part and a gear shaft, wherein the oil conveying part comprises a spray hole, one end part of the gear shaft is provided with the spline pair, the end part of the gear shaft, which is far away from the spline pair, is provided with an accessory casing,
the accessory case is internally provided with a bearing hole, and the bottom of the bearing hole is provided with an oil collecting assembly; the bearing hole is provided with an inclined hole corresponding to the lubricating oil spray hole;
the oil collecting assembly is of a double-fan-shaped combined diaphragm structure and comprises an oil collecting hole, an oil storage pipe and a step hole which are communicated with each other, the fan-shaped surfaces at two ends of the oil collecting assembly are connected through the diaphragm, the oil collecting hole communicated with the inclined hole is formed in one fan-shaped surface at one end, the oil storage pipe is arranged in the diaphragm, a boss is arranged in the middle of the diaphragm, the boss extends to the inner part of the gear shaft far away from the end part of the spline pair, and the step hole is formed in the boss;
a limiting pin is further arranged on the fan-shaped surface at the other end of the oil collecting assembly; the accessory case is also provided with a limit groove matched with the limit pin.
Further, the step hole is positioned at the center of the sector.
Further, the fan-shaped cylindrical surface of the oil collecting assembly is in clearance fit with the bearing hole.
Further, the gap is 0.005-0.039mm.
Further, an oil baffle plate is arranged on the inner side, far away from the end part of the spline pair, of the gear shaft.
Further, the oil baffle is in interference fit with the gear shaft, and the interference is 0.012-0.031mm.
Further, a hole is formed in the middle of the oil baffle, and the gap between the hole and the step hole is 1-1.5mm.
Further, an accessory mounting interface is arranged on one side of the inside of the box body, an accessory transmission shaft mounted by the accessory mounting interface is provided with an external spline, an internal spline is arranged on one side of the gear shaft, and the external spline is meshed with the internal spline to form a spline pair.
Further, the external spline is provided with an oil throwing hole.
Further, the oil conveying component is arranged on the same side of the accessory mounting interface;
the oil delivery component further comprises an oil delivery pipeline and a nozzle.
Compared with the prior art, the invention has the following beneficial effects:
the fan-shaped cylindrical surfaces at the upper end and the lower end of the oil collecting assembly in the device are in small clearance fit with the bearing holes, so that the oil collecting assembly is convenient to assemble and disassemble and is prevented from loosening. The double fan-shaped cross plate structure of the oil collecting assembly ensures the function and simultaneously maximally reduces the structural weight. Compared with the traditional oil mist lubrication mode, the device has the advantages that the lubrication of the high-speed spline pair is more sufficient, the abrasion problem of the high-speed spline pair caused by insufficient lubrication can be effectively avoided, and the service life of the spline pair is prolonged.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objects and other advantages of the invention may be realized and attained by the apparatus particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a schematic structural view of a lubrication device for an accessory drive gearbox spline pair in an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of an oil collection assembly according to an embodiment of the present invention;
fig. 3 shows a schematic structural view of an oil collecting assembly in an embodiment of the present invention.
The reference numerals are used to describe the components,
1. an oil collecting hole; 2. an oil storage pipe; 3. a step hole; 4. limit pins; 5. a nozzle; 6. a spray hole; 7. an accessory case; 8. inclined holes; 9. a bearing hole; 10. a limit groove; 11. a gear shaft; 12. a spline pair; 13. an oil baffle plate; 14. and the oil throwing hole is formed.
Detailed Description
The following description of specific embodiments of the present invention and the accompanying drawings will provide a clear and complete description of the technical solutions of embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The endpoints of the ranges and any values disclosed in the present invention are not limited to the precise range or value, and the range or value should be understood to include values close to the range or value. For numerical ranges, one or more new numerical ranges may be obtained in combination with each other between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point values, and are to be considered as specifically disclosed in the present invention.
Referring to fig. 1, in one embodiment of the present invention, there is provided a lubrication device for a spline pair of an accessory transmission gearbox, comprising a box body, an oil delivery member and a gear shaft 11, wherein the oil delivery member comprises a spray hole 6, and one end of the gear shaft 11 is provided with a spline pair 12. An accessory mounting interface is arranged on one side of the inside of the box body, an accessory transmission shaft mounted by the accessory mounting interface is provided with an external spline, one side of the gear shaft 11 is provided with an internal spline, and the external spline is meshed with the internal spline to form a spline pair 12. An accessory case 7 is arranged at the end part of the gear shaft 11, which is far away from the spline pair 12, a bearing hole 9 is arranged in the accessory case 7, and a bearing is arranged in the bearing hole 9 and used for fixing the gear shaft 11; an oil collecting assembly is arranged at the bottom of the bearing hole 9; the bearing hole 9 is provided with an inclined hole 8 corresponding to the lubricating oil spray hole 6.
In a preferred embodiment of the invention, the oil delivery component is arranged on the same side of the accessory mounting interface; the oil delivery component comprises an oil delivery pipeline, a nozzle 5 and a spray hole 6.
In a preferred embodiment of the present invention, the external spline is provided with oil drain holes 14, preferably two oil drain holes 14 arranged one above the other on the external spline, for draining the lubricating oil of the lubricating spline pair 12 into the inside of the box.
In a preferred embodiment of the invention, the cylindrical surface of the oil collection assembly is in clearance fit with the bearing bore 9, the clearance being 0.005-0.039mm.
In a preferred embodiment of the present invention, an oil baffle 13 is disposed on the inner side of the gear shaft 11 away from the end of the spline pair 12, and the oil baffle 13 is in interference fit with the gear shaft 11, and the interference is 0.012-0.031mm. A hole is arranged in the middle of the oil baffle 13, and the gap between the hole and the step hole 3 is 1-1.5mm.
Referring to fig. 2 and 3, in a preferred embodiment of the present invention, the oil collecting assembly has a structure of a double-fan-shaped combined diaphragm, and includes an oil collecting hole 1, an oil storage pipe 2 and a step hole 3 which are communicated with each other, wherein the fan-shaped surfaces at two ends of the oil collecting assembly are connected by the diaphragm, the oil collecting hole 1 which is communicated with the inclined hole 8 is arranged on one fan-shaped surface at one end for collecting the lubricating oil sprayed from the spray hole 6, the oil storage pipe 2 is arranged in the diaphragm, a boss is arranged in the middle of the diaphragm, the boss extends to the inside of the end part of the gear shaft 11, which is far from the spline pair 12, the step hole 3 is arranged in the boss, and the step hole 3 is positioned at the center of the fan-shaped surface; a limiting pin 4 is further arranged on the fan-shaped surface at the other end of the oil collecting assembly; the accessory case 7 is also provided with a limit groove 10 matched with the limit pin 4. So as to carry out circumferential limit on the oil collecting assembly and prevent the oil collecting assembly from rotating circumferentially. The fan-shaped cylindrical surfaces at the upper end and the lower end of the oil collecting assembly are in small clearance fit with the bearing holes 9, so that the oil collecting assembly is convenient to assemble and disassemble and is prevented from loosening. The double fan-shaped cross plate structure of the oil collecting assembly ensures the function and simultaneously maximally reduces the structural weight.
The working principle of the lubricating device of the spline pair of the accessory drive gear box of the embodiment is described in detail below:
when the engine works, lubricating oil in the lubricating oil tank enters an oil pipeline in the accessory transmission gearbox through the lubricating oil pump, then is sprayed to the vicinity of a bearing hole 9 in the accessory casing 7 through a spray hole 6 in the spray nozzle 5, an inclined hole 8 is formed in the outer portion of the bearing hole 9, the lubricating oil sprayed from the spray hole 6 enters an oil collecting hole 1 in the oil collecting assembly through the inclined hole 8, then enters a gear shaft 11 through the oil storage pipe 2 and the step hole 3, an oil baffle 13 is arranged in the gear shaft 11 to prevent the lubricating oil from the step hole 3 from entering the bearing hole 9, the oil baffle 13 is in interference fit with the gear shaft 11, the interference is 0.012-0.031mm, and a hole is formed in the middle of the oil baffle 13, and a gap between the lubricating oil and the step hole 3 is 1-1.5mm. The lubricating oil entering the inner hole of the gear shaft 11 flows into the spline pair 12 with the highest rotating speed of 29700r/min to fully lubricate the spline pair due to the high-speed rotation of the gear shaft 11, and finally is discharged into the accessory transmission gear box through two oil throwing holes 14 arranged on the inner spline.
According to the other embodiment of the invention, the lubricating device of the spline pair of the accessory transmission gear box is applied to a 1600kW aviation scroll engine, and the result shows that the maximum working time of a single engine is 150 hours along with the whole engine bench test of about 500 hours, the engine works stably, the spline pair is well lubricated, and no abnormal abrasion phenomenon occurs. This shows that the lubricating device of the accessory drive gear box spline pair is suitable for lubricating the high-speed spline pair.
In summary, the lubricating device for the spline pair of the accessory transmission gear box can effectively solve the problem of lubricating the spline pair between the accessory with high rotation speed of the aeroengine and the accessory transmission gear box, and compared with a traditional oil mist lubricating mode, the lubricating device for the spline pair with high rotation speed is more sufficient in lubricating, can effectively avoid the problem of abrasion of the spline pair with high rotation speed caused by insufficient lubricating, and prolongs the service life of the spline pair.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Unless otherwise defined and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanical or electrical, or may be in communication with each other between two elements, directly or indirectly via an intermediate medium, as will be understood by those of ordinary skill in the art, as appropriate.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.

Claims (10)

1. The lubricating device for the spline pair of the accessory transmission gearbox comprises a box body, an oil conveying part and a gear shaft (11), wherein the oil conveying part comprises a spray hole (6), a spline pair (12) is arranged at one end part of the gear shaft (11), an accessory casing (7) is arranged at the end part of the gear shaft (11) far away from the spline pair (12),
a bearing hole (9) is formed in the accessory case (7), and an oil collecting assembly is arranged at the bottom of the bearing hole (9); an inclined hole (8) corresponding to the lubricating oil spray hole (6) is formed in the bearing hole (9);
the oil collecting assembly is of a double-fan-shaped combined diaphragm structure and comprises an oil collecting hole (1), an oil storage pipe (2) and a step hole (3) which are communicated with each other, the fan-shaped surfaces at two ends of the oil collecting assembly are connected through the diaphragm, the oil collecting hole (1) which is communicated with the inclined hole (8) is arranged on one fan-shaped surface at one end of the oil collecting assembly, the oil storage pipe (2) is arranged in the diaphragm, a boss is arranged in the middle of the diaphragm, the boss extends to the inner part of the end part of the gear shaft (11) far away from the spline pair (12), and the step hole (3) is formed in the boss;
a limiting pin (4) is further arranged on the fan-shaped surface at the other end of the oil collecting assembly; the accessory case (7) is also provided with a limiting groove (10) matched with the limiting pin (4).
2. The device according to claim 1, characterized in that the stepped hole (3) is located at the centre of the sector.
3. Device according to claim 1, characterized in that the scalloped cylindrical surface of the oil collection assembly is in clearance fit with the bearing bore (9).
4. A device according to claim 3, wherein the gap is 0.005-0.039mm.
5. Device according to claim 1, characterized in that the gear shaft (11) is provided with an oil baffle (13) on the inner side remote from the end of the spline pair (12).
6. The device according to claim 5, characterized in that the oil baffle (13) is in interference fit with the gear shaft (11) with an interference of 0.012-0.031mm.
7. Device according to claim 6, characterized in that a hole is provided in the middle of the oil baffle (13), the clearance between the hole and the stepped hole (3) being 1-1.5mm.
8. The device according to any one of claims 1-7, characterized in that an accessory mounting interface is provided on one side of the interior of the housing, an accessory drive shaft mounted by the accessory mounting interface is provided with external splines, one side of the gear shaft (11) is provided with internal splines, and the external splines are meshed with the internal splines to form a spline pair (12).
9. The device according to claim 8, characterized in that the external spline is provided with oil slinger holes (14).
10. The device of claim 8, wherein the oil delivery component is disposed on the same side of the accessory mounting interface;
the oil delivery component further comprises an oil delivery pipeline and a nozzle (5).
CN202310323693.7A 2023-03-29 2023-03-29 Lubricating device for spline pair of accessory transmission gear box Pending CN116576244A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310323693.7A CN116576244A (en) 2023-03-29 2023-03-29 Lubricating device for spline pair of accessory transmission gear box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310323693.7A CN116576244A (en) 2023-03-29 2023-03-29 Lubricating device for spline pair of accessory transmission gear box

Publications (1)

Publication Number Publication Date
CN116576244A true CN116576244A (en) 2023-08-11

Family

ID=87544257

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310323693.7A Pending CN116576244A (en) 2023-03-29 2023-03-29 Lubricating device for spline pair of accessory transmission gear box

Country Status (1)

Country Link
CN (1) CN116576244A (en)

Similar Documents

Publication Publication Date Title
CN108869023B (en) Self-lubricating system of power takeoff
US20170314469A1 (en) Reconfigurable lubrication system for multiple powertrain orientations
CN110529425A (en) A kind of lubrication system for high revolving speed centrifugal pump
CN116576244A (en) Lubricating device for spline pair of accessory transmission gear box
CN101105197A (en) Crankshaft for gasoline engine
CN219062401U (en) Forced lubrication device for crankshaft transmission
CN215521914U (en) A lubricating structure for gear box
CN113513575A (en) Spline connection lubricating structure
CN219197694U (en) Pump shaft mounting structure of vertical lubricating oil pump
CN213655659U (en) Loader gearbox shaft gear device beneficial to lubrication
CN214661931U (en) Clutch lubricating and oil return structure with overload protector
CN217003036U (en) Lubricating structure of far-end bearing
CN110848376B (en) Oil supply lubricating device for bearing of transmission
CN220185643U (en) High-stability spherical hinge type coupling
CN216666266U (en) Bearing with fracture early warning function
CN212407507U (en) Input structure of driftage becomes oar gear box
CN111288152A (en) Bearing lubricating device
CN217502544U (en) Planetary gear box for high-rotating-speed electric automobile
CN220320242U (en) Through axle inter-axle differential and vehicle
CN219472696U (en) Lubricating structure of casing
CN218408397U (en) Differential gear
CN218152281U (en) Transmission device
CN219317578U (en) Gearbox housing facilitating splash lubrication
CN214273811U (en) Lubricating structure of aero-engine transmission system
CN216158799U (en) Cycloid pump shaft inner hole end surface oil film lubricating structure suitable for high temperature environment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination