CN108082463A - A kind of mounting structure of lifting airscrew axis - Google Patents
A kind of mounting structure of lifting airscrew axis Download PDFInfo
- Publication number
- CN108082463A CN108082463A CN201810030105.XA CN201810030105A CN108082463A CN 108082463 A CN108082463 A CN 108082463A CN 201810030105 A CN201810030105 A CN 201810030105A CN 108082463 A CN108082463 A CN 108082463A
- Authority
- CN
- China
- Prior art keywords
- primary load
- load bearing
- top pressure
- rotor shaft
- pressure bushing
- 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
Links
- 239000000463 material Substances 0.000 claims abstract description 5
- 208000027418 Wounds and injury Diseases 0.000 abstract description 2
- 208000014674 injury Diseases 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/04—Helicopters
- B64C27/08—Helicopters with two or more rotors
- B64C27/10—Helicopters with two or more rotors arranged coaxially
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
The present invention relates to a kind of mounting structures of lifting airscrew axis, including main rotor shaft, housing, taper roll bearing, primary load bearing nut, top pressure bushing, the main rotor shaft is mounted on by taper roll bearing on the housing of helicopter, primary load bearing nut is installed in main rotor shaft, top pressure bushing is arranged between primary load bearing nut and taper roll bearing inner ring, and the top pressure bushing is a section in the annulus of the L-shaped to center of circle direction protrusion；The material of the top pressure bushing is 1Cr17Ni4Cu4Nb.The present invention without using hydraulic torque spanner, is greatly reduced the frictional force between rotor shaft and primary load bearing nut, makes part injury-free when primary load bearing nut is mounted and dismounted, and ensures assembling quality, it is ensured that the flight safety of helicopter.
Description
Technical field
The present invention relates to a kind of mounting structure, especially a kind of mounting structure of lifting airscrew axis can be realized coaxial
The convenient installation and removal of each component of twin-rotor helicopter rotor shaft.
Background technology
Coaxial double-rotor helicopter refers generally to coaxial helicopter, and rotor shaft primary load bearing nut main function is
Lock the large-scale taper roll bearing of a pair that is opposite and filling in rotor shaft.In flight course, for ensure bearing roller with it is inside and outside
Effective fitting of ring prevents shaft strength disengagement from bearing failure being caused to damage, and it is more than to go straight up to that rotor shaft primary load bearing nut, which will undertake,
Machine is conducted oneself with dignity and its axial force of load weight, is the vital part in Helicopter Main Reducer.
Assembling and decomposition for primary load bearing nut, main method have using large-scale torque spanner, torque multiplier and liquid
The methods of pressing torque spanner, the large-scale torque spanner output torque upper limit are generally less than 2000N.m, in torque multiplier output torque
Limit is generally less than 15000N.m, and under normal circumstances, the primary load bearing nut of Medium Helicopter when reaching requirement, it is necessary to
For torque in 50000-80000N.m, foregoing device can not meet the assembly and disassembly requirement of rotor shaft primary load bearing nut.At present
The means often used are by way of hydraulic torque spanner, can provide higher output torque, and highest output torque can be with
When reaching 100000N.m, but using hydraulic torque spanner, frictional force is excessive between rotor shaft and primary load bearing nut, easily causes spiral shell
Female and rotor axle thread and other associated damages, can not ensure the flight safety of aircraft, and cause huge economic losses.
The content of the invention
The object of the present invention is to provide a kind of mounting structures of lifting airscrew axis, meet coaxial double-rotor helicopter master and subtract
The requirement of fast device rotor shaft, meanwhile, installation torque and frictional force when reducing the installation of primary load bearing nut and decomposing are realized straight
The convenient installation and removal of each component in machine rotor shaft are risen, improve main reducing gear service life.
The technical scheme is that：The mounting structure of the lifting airscrew axis includes main rotor shaft, housing, circular cone
Roller bearing, primary load bearing nut, top pressure bushing, the main rotor shaft are mounted on the housing of helicopter by taper roll bearing
On, screw thread is provided in main rotor shaft, and primary load bearing nut is installed, top pressure bushing is arranged on primary load bearing nut and taper roller axis
Between holding inner ring, the top pressure bushing is a section in the annulus of the L-shaped to center of circle direction protrusion, L-shaped minimum diameter and rotation
Wing axis crest clearance coordinates, and the large-sized internal diameter of L-shaped is more than the outer diameter of primary load bearing nut, and the height of bushing is more than primary load bearing nut
Height；The material of the top pressure bushing is 1Cr17Ni4Cu4Nb.
The present invention is arranged on original architecture basics, is provided between primary load bearing bearing and taper roll bearing inner ring
Top pressure bushing when mounted, is first mounted in rotor shaft by top pressure bushing, by applying axial force to top pressure bushing, and it is axial
Power is helicopter all-up weight, at this moment will act on the axial force on primary load bearing nut originally, and was transferred on top pressure bushing, is reduced
The mounting torque of primary load bearing nut, by way of conventional and means, it is possible to be installed in place primary load bearing nut.It is dismantling
When, equally to applying axial force to top pressure bushing, the axial force on primary load bearing nut will be acted on originally, and be transferred to top pressure bushing
On, primary load bearing nut does not stress, and can easily disassemble.The material of top pressure bushing be 1Cr17Ni4Cu4Nb, intensity compared with
Height can bear helicopter all-up weight.The present invention is when primary load bearing nut mounts and dismounts, without using hydraulic torque spanner,
The frictional force between rotor shaft and primary load bearing nut is greatly reduced, makes part injury-free, ensures assembling quality, it is ensured that helicopter
Flight safety.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
As shown in the figure, the mounting structure of lifting airscrew axis is held including main rotor shaft 3, housing 5, taper roll bearing 4, master
Power nut 2, top pressure bushing 1, the main rotor shaft 3 are mounted on by taper roll bearing 4 on the housing 5 of helicopter, main rotation
Screw thread is provided on wing axis 3, and primary load bearing nut 2 is installed, top pressure bushing 1 is arranged on primary load bearing nut 2 and taper roll bearing 4
Between inner ring, the top pressure bushing 1 is a section in the annulus of the L-shaped to center of circle direction protrusion, L-shaped minimum diameter and main rotation
3 crest clearance of wing axis coordinates, and the large-sized internal diameter of L-shaped is more than the outer diameter of primary load bearing nut 2, and the height of top pressure bushing 1 is more than master
The height of load nut 2；The material of the top pressure bushing 1 is 1Cr17Ni4Cu4Nb.
Claims (2)
1. a kind of mounting structure of lifting airscrew axis, which is characterized in that the structure includes main rotor shaft (3), housing
(5), taper roll bearing (4), primary load bearing nut (2), top pressure bushing (1), the main rotor shaft (3) pass through taper roller axis
(4) are held on the housing (5) of helicopter, main rotor shaft is provided with screw thread on (3), and installs primary load bearing nut (2), top pressure
Bushing (1) is arranged between primary load bearing nut (2) and taper roll bearing (4) inner ring, and the top pressure bushing (1) is a section
In the annulus of the L-shaped to center of circle direction protrusion, L-shaped minimum diameter coordinates with main rotor shaft (3) crest clearance, and L-shaped is large-sized
Internal diameter is more than the outer diameter of primary load bearing nut (2), and the height of top pressure bushing (1) is more than the height of primary load bearing nut (2).
2. the mounting structure of lifting airscrew axis as described in claim 1, which is characterized in that the top pressure bushing (1)
Material is 1Cr17Ni4Cu4Nb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810030105.XA CN108082463A (en) | 2018-01-12 | 2018-01-12 | A kind of mounting structure of lifting airscrew axis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810030105.XA CN108082463A (en) | 2018-01-12 | 2018-01-12 | A kind of mounting structure of lifting airscrew axis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108082463A true CN108082463A (en) | 2018-05-29 |
Family
ID=62182927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810030105.XA Pending CN108082463A (en) | 2018-01-12 | 2018-01-12 | A kind of mounting structure of lifting airscrew axis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108082463A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112937881A (en) * | 2021-02-09 | 2021-06-11 | 中国航发哈尔滨东安发动机有限公司 | Face gear transmission coaxial reversing device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001208087A (en) * | 2000-01-27 | 2001-08-03 | Ntn Corp | Bearing device and its lock nut for bearing |
| CN203035711U (en) * | 2012-12-29 | 2013-07-03 | 广州市昊志机电股份有限公司 | Locknut retaining structure for high-speed ball electric spindle bearing |
| CN204276918U (en) * | 2014-11-24 | 2015-04-22 | 深圳市速锋科技有限公司 | A kind of bearing locking device of high-speed electric main shaft |
| DE102015000846A1 (en) * | 2015-01-27 | 2016-07-28 | Markus Landwehr | Assembly unit for the axial clamping of rolling bearings on axles and shafts |
| CN205524967U (en) * | 2016-01-13 | 2016-08-31 | 中国航空动力机械研究所 | Rotor shaft device and have its helicopter |
| DE102015012705A1 (en) * | 2015-10-03 | 2017-04-06 | Markus Landwehr | Clamping unit for rolling bearings on axles and shafts |
| CN207956053U (en) * | 2018-01-12 | 2018-10-12 | 中国航发哈尔滨东安发动机有限公司 | A kind of mounting structure of lifting airscrew axis |
-
2018
- 2018-01-12 CN CN201810030105.XA patent/CN108082463A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001208087A (en) * | 2000-01-27 | 2001-08-03 | Ntn Corp | Bearing device and its lock nut for bearing |
| CN203035711U (en) * | 2012-12-29 | 2013-07-03 | 广州市昊志机电股份有限公司 | Locknut retaining structure for high-speed ball electric spindle bearing |
| CN204276918U (en) * | 2014-11-24 | 2015-04-22 | 深圳市速锋科技有限公司 | A kind of bearing locking device of high-speed electric main shaft |
| DE102015000846A1 (en) * | 2015-01-27 | 2016-07-28 | Markus Landwehr | Assembly unit for the axial clamping of rolling bearings on axles and shafts |
| DE102015012705A1 (en) * | 2015-10-03 | 2017-04-06 | Markus Landwehr | Clamping unit for rolling bearings on axles and shafts |
| CN205524967U (en) * | 2016-01-13 | 2016-08-31 | 中国航空动力机械研究所 | Rotor shaft device and have its helicopter |
| CN207956053U (en) * | 2018-01-12 | 2018-10-12 | 中国航发哈尔滨东安发动机有限公司 | A kind of mounting structure of lifting airscrew axis |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112937881A (en) * | 2021-02-09 | 2021-06-11 | 中国航发哈尔滨东安发动机有限公司 | Face gear transmission coaxial reversing device |
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