CN205096828U - Gas turbine rotor attachment bolt preloading device - Google Patents
Gas turbine rotor attachment bolt preloading device Download PDFInfo
- Publication number
- CN205096828U CN205096828U CN201520802381.5U CN201520802381U CN205096828U CN 205096828 U CN205096828 U CN 205096828U CN 201520802381 U CN201520802381 U CN 201520802381U CN 205096828 U CN205096828 U CN 205096828U
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- Prior art keywords
- bolt
- gas turbine
- turbine rotor
- attachment bolt
- piston cylinder
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- 230000008878 coupling Effects 0.000 claims description 16
- 238000010168 coupling process Methods 0.000 claims description 16
- 238000005859 coupling reaction Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model provides a gas turbine rotor attachment bolt preloading device, its includes the back taper bearing, piston cylinder of bearing top fixedly connected with, but piston cylinder top swivelling joint has adjusting nut, adjusting nut is connected with a tensile bolt, tensile bolt has cup jointed the movable sleeve that lives, the bearing lateral wall be provided with at least one be used for right the movable sleeve that lives carries out the opening operated. The utility model provides a gas turbine rotor attachment bolt preloading device, simple structure is convenient for make, does not have the shear force of turning round and a yawing force in the pretension process of antitrochanter attachment bolt, the also zero friction damage of contact surface of antitrochanter attachment bolt, consequently, in the assembly of gas turbine rotor attachment bolt, dismantle quality and precision that the hookup of rotor attachment bolt can be ensured to the in -process.
Description
Technical Field
The utility model relates to the field of machinary, in particular to gas turbine rotor hookup bolt preloading device.
Background
In the assembly of an aircraft engine, a bolt pre-tightening technology is widely adopted, and in a turboshaft, a turboprop and an industrial gas turbine engine, a disk shaft connection and a central screw rod connection applying pre-tightening force are adopted for connecting rotors at all stages. During the working process of the engine, the rotor has the phenomena of axial contraction and elongation due to the action of centrifugal force, gas force, thermal load and maneuvering load. Therefore, in order to ensure safe and reliable operation of the high-speed rotor, axial pre-tightening force must be applied to the connecting bolt during assembly, and the magnitude of the axial pre-tightening force must be proper. The pretightening force is too small, when the bolt bears a large axial load, the clamping force of the connected part is too small, and the rotor cannot be normally connected and operated; the pretightening force is too big, and the bolt bears great axial load to the safe deposit of bolt has been reduced. Therefore, to ensure the operational reliability of the bolted rotor, precise pretension must be applied to the rotor attachment bolts.
Fig. 1 is a schematic view of a connection structure of a gas turbine rotor coupling bolt, and referring to fig. 1, a rotor coupling bolt 1 is fixed to a bearing housing 3 through a coupling nut 2 for coupling an output coupling 4, a compressor rotor (not shown) and a turbine rotor (not shown) together. In order to ensure the safe and reliable operation of the rotor of the gas turbine, accurate axial pretightening force must be applied to the rotor connecting bolt during assembly, and meanwhile, the friction damage of a threaded connecting contact surface is avoided.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the present invention is to provide a gas turbine rotor fastening bolt pretensioning device to reduce or avoid the aforementioned problems.
In order to solve the technical problem, the utility model provides a gas turbine rotor draw bolt preloading device, it includes the back taper bearing, a bearing top fixedly connected with piston cylinder, but piston cylinder top swivelling joint has adjusting nut, adjusting nut is connected with a stretch bolt, stretch bolt has cup jointed a movable sleeve, the bearing lateral wall is provided with at least one and is used for right the opening that movable sleeve operated.
Preferably, the piston cylinder is an oil pressure piston cylinder.
Preferably, the movable sleeve is provided with a regular hexagonal cross-section.
Preferably, three openings are uniformly distributed on the side wall of the supporting seat.
The utility model provides a gas turbine rotor connecting bolt preloading device, simple structure, the manufacturing of being convenient for is at the pretension process of rotor connecting bolt torsional shear force and yawing force not have, also does not have the friction damage to rotor connecting bolt's contact surface, consequently, can ensure the quality and the precision of rotor connecting bolt hookup at gas turbine rotor connecting bolt's assembly, dismantlement in-process.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein,
FIG. 1 is a schematic view of a gas turbine rotor coupling bolt connection structure;
fig. 2 is a schematic structural diagram of a gas turbine rotor coupling bolt pretensioning device according to an embodiment of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings. Wherein like parts are given like reference numerals.
Fig. 2 is a schematic structural diagram of a gas turbine rotor fastening bolt preloading device according to a specific embodiment of the present invention, as shown in fig. 2, the present invention provides a gas turbine rotor fastening bolt preloading device, which includes an inverted cone-shaped supporting seat 50, a piston cylinder 51 fixedly connected to the top of the supporting seat 50, a regulating nut 52 rotatably connected to the top of the piston cylinder 51, the regulating nut 52 is connected with a stretching bolt 53, the stretching bolt 53 is sleeved with a movable sleeve 54, the side wall of the supporting seat 50 is provided with at least one opening 501 for operating the movable sleeve 54.
The working principle of the gas turbine rotor connecting bolt pre-tightening device is that the supporting seat 50 is used for being placed on the supporting seat 3, on one hand, the piston cylinder 51 is supported, on the other hand, the positioning of the stretching bolt 53 can be facilitated, the working stroke of the stretching bolt 53 is enabled to be consistent with the axis of the rotor connecting bolt 1, the size requirement on the piston cylinder 51 can be reduced due to the fact that the supporting seat 50 is of an inverted conical structure, and therefore the smaller piston cylinder 51 can be installed.
After the tension bolt 53 is connected to the rotor coupling bolt 1 through the adjusting nut 52, the piston cylinder 51 is lifted up, so that the rotor coupling bolt 1 can be tensioned through the tension bolt 53, that is, the rotor coupling bolt 1 is prestressed. The piston cylinder 51 can be a pneumatic piston cylinder or an oil pressure piston cylinder, so that the stroke of the adjusting nut 52 can be precisely adjusted, and the rotor connecting bolt 1 can be accurately prestressed.
The movable sleeve 54 is used to apply tightening and loosening operations to the coupling nut 2, and the movable sleeve 54 may be provided with a regular hexagonal or square cross-section so that precise tightening force can be applied to the coupling nut 2 through the movable sleeve 54 using an existing torque wrench. The side wall of the supporting seat 50 is provided with at least one opening 501 for operating the movable sleeve 54, for example, three openings 501 may be uniformly distributed on the side wall of the supporting seat 50 adjacent to 120 degrees, so that the movable sleeve 54 can be conveniently clamped by a tool such as a torque wrench for operation.
Of course, in order to avoid damage to the bearing seat 3 during the process of stretching the rotor coupling bolt 1, a copper pad 55 may be disposed between the bearing seat 50 and the bearing seat 3 for buffering.
The utility model provides a gas turbine rotor connecting bolt preloading device, simple structure, the manufacturing of being convenient for is at the pretension process of rotor connecting bolt torsional shear force and yawing force not have, also does not have the friction damage to rotor connecting bolt's contact surface, consequently, can ensure the quality and the precision of rotor connecting bolt hookup at gas turbine rotor connecting bolt's assembly, dismantlement in-process.
It is to be understood by those skilled in the art that while the present invention has been described in terms of several embodiments, it is not intended that each embodiment cover a separate embodiment. The description is given for clearness of understanding only, and it is to be understood that all matters in the embodiments are to be interpreted as including all technical equivalents which are encompassed by the claims.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations that may be made by those skilled in the art without departing from the spirit and principles of the invention should be considered within the scope of the invention.
Claims (4)
1. The pretightening device for the connecting bolt of the rotor of the gas turbine is characterized by comprising an inverted cone-shaped supporting seat, wherein the top of the supporting seat is fixedly connected with a piston cylinder, the top of the piston cylinder is rotatably connected with an adjusting nut, the adjusting nut is connected with a stretching bolt, the stretching bolt is sleeved with a movable sleeve, and the side wall of the supporting seat is provided with at least one opening for operating the movable sleeve.
2. The gas turbine rotor coupling bolt pretensioning device of claim 1, wherein the piston cylinder is an oil pressure piston cylinder.
3. Gas turbine rotor coupling bolt pretensioning device according to claim 1, characterized in that the movable sleeve is provided with a regular hexagonal cross-section.
4. The gas turbine rotor coupling bolt pretensioning device of claim 1, wherein three of said openings are uniformly distributed in said bearing block sidewall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520802381.5U CN205096828U (en) | 2015-10-16 | 2015-10-16 | Gas turbine rotor attachment bolt preloading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520802381.5U CN205096828U (en) | 2015-10-16 | 2015-10-16 | Gas turbine rotor attachment bolt preloading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205096828U true CN205096828U (en) | 2016-03-23 |
Family
ID=55512638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520802381.5U Active CN205096828U (en) | 2015-10-16 | 2015-10-16 | Gas turbine rotor attachment bolt preloading device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205096828U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225393A (en) * | 2017-06-02 | 2017-10-03 | 中国航发南方工业有限公司 | Compressor auxiliary installation device |
| CN108000436A (en) * | 2017-12-01 | 2018-05-08 | 中国航发南方工业有限公司 | A kind of aero-engine high-torque nut assembling method |
-
2015
- 2015-10-16 CN CN201520802381.5U patent/CN205096828U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225393A (en) * | 2017-06-02 | 2017-10-03 | 中国航发南方工业有限公司 | Compressor auxiliary installation device |
| CN108000436A (en) * | 2017-12-01 | 2018-05-08 | 中国航发南方工业有限公司 | A kind of aero-engine high-torque nut assembling method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee after: China Hangfa South Industrial Co. Ltd. Address before: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee before: China Southern Airlines Industry (Group) Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder |