CN106050312B - Wheel disc, circumferential rod fastening rotor and gas turbine used in circumferential rod fastening rotor - Google Patents
Wheel disc, circumferential rod fastening rotor and gas turbine used in circumferential rod fastening rotor Download PDFInfo
- Publication number
- CN106050312B CN106050312B CN201610634305.7A CN201610634305A CN106050312B CN 106050312 B CN106050312 B CN 106050312B CN 201610634305 A CN201610634305 A CN 201610634305A CN 106050312 B CN106050312 B CN 106050312B
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- Prior art keywords
- wheel disc
- gas turbine
- rod
- pull rod
- circular hole
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections
- F01D5/066—Connecting means for joining rotor-discs or rotor-elements together, e.g. by a central bolt, by clamps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The present invention provides wheel disc, circumferential direction rod fastening rotor and the gas turbine used in a kind of circumferential rod fastening rotor, and the wheel disc is equipped with multiple tie rod holes passed through for pull rod, and all tie rod holes are circumferentially uniformly distributed around wheel disc central axis；Each tie rod hole is formed from basic circular hole and based on basic circular hole to the arc groove extended out, the diameter of the basic circular hole is more than the maximum outside diameter on the pull rod, the arc groove has two sections and symmetrical, in the vertical join line of the center of circle of the basic circular hole and wheel disc central axis, the internal diameter of two sections of arc grooves is equal with the maximum outside diameter of the pull rod in the center of circle of two sections of arc grooves.The present invention reduces the stress concentration of tie rod hole contact area, the bulk life time of wheel disc and pull rod is improved, conducive to the safe operation of unit.
Description
Technical field
The present invention relates to gas turbine technology field, more particularly to used in a kind of circumferential rod fastening rotor wheel disc, circumferential direction
Rod fastening rotor and gas turbine.
Background technology
The structure type of heavy duty gas turbine rotor is varied at present, be roughly divided into drum rotor, disk rotor and
Disk drum type rotor three types.
Drum rotor is made of drum barrel and semiaxis, and rotor structure is simple, and amount of machining is small, and rigidity is good, generally rigidly
Axis.But since it by drum barrel bears centrifugal force load, intensity difference, peripheral speed cannot be too high at drum barrel outer diameter, and drum turns
It is rarely employed in heavy duty gas turbine before specific item.
On axis, torque is transmitted by the pretightning force of hot jacket with certain interference volume hot jacket for the wheel discs at different levels of disk rotor.Wheel
The intensity of disk is good, but its main shaft is elongated, and so as to poor rigidity, critical speed is low, is generally only designed to flex rotor, is also unsuitable for
Heavy duty gas turbine.
Disk drum type rotor is rotary drum in wheel rim or close at wheel rim, and rigidity is good, and centrifugal force is then born by wheel disc, therefore intensity
It is high, it is seen that disk drum type rotor combines the advantages of drum rotor and disk rotor, and due to this feature, disk drum type rotor may be used also
Most light quality can be reached.At present, disk drum type rotor is in the gas turbine using very extensively.Disk drum type rotor refers mainly to draw at present
Bar combination order drum-type, pull rod composite fabricated rotor include circumferential pull rod combined type and central draw bar type, pull rod combined rotor structure
Pretightning force is provided by pull rod, by end-tooth or rubbing surface torsion pass.
In the prior art, gas turbine circumferential direction pull rod is generally pole type structure, and with wheel disc cooperation position at process
For cylindrical type convex shoulder, several circular holes are machined on wheel disc, are typical round cooperation with pull rod convex shoulder.It is transported in gas turbine rotor
During row, pull rod convex shoulder is contacted with the contact form of tie rod hole for line, and the stress concentration of pull rod convex shoulder and tie rod hole is more apparent, connects
It is excessive to touch stress, pull rod and wheel disc may be damaged, be unfavorable for gas turbine safe operation.
Therefore, it is necessary to a kind of wheeling disk structures that can reduce the stress between pull rod convex shoulder and tie rod hole.
Invention content
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide used in a kind of circumferential rod fastening rotor
Wheel disc, circumferential rod fastening rotor and gas turbine, for solve in the prior art the stress concentration between pull rod and tie rod hole, pull rod and
Wheel disc is easy to the problem of damage.
In order to achieve the above objects and other related objects, the present invention is provided used in a kind of gas turbine circumferential direction rod fastening rotor
Wheel disc, the wheel disc are equipped with multiple tie rod holes passed through for pull rod, circumferential uniform point around wheel disc central axis of all tie rod holes
Cloth；Each tie rod hole is formed from basic circular hole and based on basic circular hole to the arc groove extended out, and the diameter of the basic circular hole is big
Maximum outside diameter on the pull rod, the arc groove have two sections and symmetrical, and the center of circle of two sections of arc grooves is in the base
On the center of circle of this circular hole and the vertical join line of wheel disc central axis, the maximum outside diameter phase of the internal diameter of two sections of arc grooves and the pull rod
Deng.
Preferably, the distance in the center of circle of the center of circle of two sections of arc grooves to the basic circular hole is equal.
Preferably, the distance in the center of circle of the arc groove to the center of circle of the basic circular hole is total with the pull rod respectively
The center of circle of long, basic circular hole is to the radial distance of the wheel disc central axis and the rotating speed of circumferential rod fastening rotor itself into just
Than.
Preferably, the pull rod is alternately connected with roundlet shell of column by big cylindrical section and formed, and the outer diameter of the big cylindrical section is big
In the outer diameter of the roundlet shell of column, and the big cylindrical section is located in the tie rod hole, the outer diameter of big cylindrical section and the circular arc
The internal diameter of slot is identical.
The present invention also provides a kind of gas turbine circumferential direction rod fastening rotor, the gas turbine circumferential direction rod fastening rotor is using as above
Wheel disc used in the gas turbine circumferential direction rod fastening rotor realizes that pull rod is contacted with the tie rod hole inner wall on wheel disc for face.
The present invention also provides a kind of gas turbine, the gas turbine is turned using gas turbine circumferential direction pull rod as described above
Son.
As described above, wheel disc, circumferential rod fastening rotor and gas turbine used in the circumferential rod fastening rotor of the present invention, have with
Lower advantageous effect：Tie rod hole on the wheel disc of the present invention its with symmetrical two sections of arc grooves, two sections of arc grooves are substantially round
To extending out what is formed, and the internal diameter of two sections of arc grooves is equal with the maximum outside diameter of pull rod on the basis of hole, i.e. the internal diameter of arc groove
It is equal with the pull rod convex shoulder outer diameter on pull rod so that during gas turbine operation, pull rod is bent by centrifugal force effect
After deformation, pull rod convex shoulder is contacted with tie rod hole for face, reduces the stress concentration of tie rod hole contact area, improves wheel disc and pull rod
Bulk life time, conducive to the safe operation of unit.
Description of the drawings
Fig. 1 is shown as the structure diagram of wheel disc and pull rod in circumferential rod fastening rotor.
Fig. 2 is shown as the wheel disc schematic diagram used in the circumferential rod fastening rotor of the present invention.
Fig. 3 is shown as the schematic cross-section of the tie rod hole on the wheel disc used in the circumferential rod fastening rotor of the present invention.
Component label instructions
1 wheel disc
2 pull rods
21 pull rod convex shoulders
22 roundlet shell of columns
3 tie rod holes
31 basic circular holes
32 arc grooves
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
It please refers to Fig.1 to Fig.3.It should be clear that structure, ratio, size depicted in this specification institute attached drawing etc., only to
Coordinate the revealed content of specification, so that those skilled in the art understands and reads, being not limited to the present invention can be real
The qualifications applied, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
It is whole, in the case where not influencing the effect of present invention can be generated and the purpose that can reach, should all still fall in disclosed skill
In the range of art content can cover.Meanwhile in this specification it is cited as " on ", " under ", "left", "right", " centre " and
The term of " one " etc. is merely convenient to understanding rather than to limit the enforceable range of the present invention for narration, relativeness
It is altered or modified, in the case where changing technology contents without essence, when being also considered as the enforceable scope of the present invention.
As shown in Figure 1, Figure 2 and Figure 3, the present invention provides the wheel disc used in a kind of gas turbine circumferential direction rod fastening rotor, wheel disc 1
Multiple tie rod holes 3 passed through for pull rod 2 are equipped with, all tie rod holes 3 are circumferentially uniformly distributed around wheel disc central axis；Each pull rod
Hole 3 is formed from basic circular hole 31 and based on basic circular hole to the arc groove 32 extended out, as shown in Figure 3, the diameter of basic circular hole 31
Φ is more than the maximum outside diameter on pull rod 2, the outer diameter of maximum outside diameter, that is, pull rod convex shoulder 21 on pull rod 2, arc groove 32 have two sections and
Symmetrical, the center of circle of two sections of arc grooves 32 is on the vertical join line AA of the center of circle of basic circular hole and wheel disc central axis, and two
The internal diameter of section arc groove 32 is equal with the maximum outside diameter of pull rod 2.The present invention wheel disc 1 on tie rod hole 2 its with symmetrical two
Section arc groove 32, two sections of arc grooves 32 to be formed on the basis of basic circular hole 31 to extending out, and two sections of arc grooves 32 is interior
Diameter is equal with the maximum outside diameter of pull rod 2, and R represents the radius of arc groove 32, i.e. drawing on the internal diameter and pull rod of arc groove 32 in Fig. 3
Bar convex shoulder outer diameter is equal so that during gas turbine operation, after pull rod 2 is occured bending and deformation by centrifugal force effect, and pull rod
Convex shoulder 21 is contacted with tie rod hole 3 for face, reduces the stress concentration of 2 contact area of tie rod hole, improves the entirety of wheel disc 1 and pull rod 2
Service life, conducive to the safe operation of unit.
To better assure that pull rod and tie rod hole are that face contacts, the center of circle of above-mentioned two sections of arc grooves 32 to basic circular hole 31
The distance in the center of circle is equal, i.e., the distance that the center of circle of basic circular hole 31 is deviateed in the center of circle of two sections arc grooves 32 is e, as shown in Figure 3.
And the distance e in the center of circle of arc groove 32 to the center of circle of basic circular hole 31 is directly proportional to the overall length of pull rod, also with the diameter of tie rod hole
It is related to position, i.e., it is directly proportional to the radial distance of the center of circle to the wheel disc central axis of basic circular hole 31, also turn with circumferential pull rod
The rotating speed of son itself is directly proportional.
Usually, above-mentioned pull rod 2 replaces phase by big cylindrical section (i.e. big cylindrical section is pull rod convex shoulder 21) and roundlet shell of column 22
It even forms, the outer diameter of big cylindrical section is more than the outer diameter of roundlet shell of column 22, and big cylindrical section is located in tie rod hole 2, big cylindrical section
Outer diameter is identical with the internal diameter of arc groove.Big cylindrical section, that is, pull rod convex shoulder 21 of usual pull rod 2 is located in tie rod hole 3, with tie rod hole
Inner wall contact, so the diameter of above-mentioned basic circular hole 31 be slightly larger than pull rod convex shoulder 21 outer diameter, you can pass through pull rod.
The process engineering of above-mentioned tie rod hole is：Diameter of phi is first processed on wheel disc 1 and is slightly larger than pull rod convex shoulder outer diameter (i.e. 2R)
Basic circular hole 31, then on the line of centres of the center of circle of basic circular hole 31 and wheel disc, i.e., the center of circle of basic circular hole 31 and wheel disc
Central axis vertical join line on, the center of circle using basic circular hole 31 be midpoint toward both sides offset distance as e, respectively with this deviate
2 points afterwards are the center of circle, and 2R is diameter, process half slot, that is, form above-mentioned arc groove 32.The process can be in basic circular hole
On the basis of formed two arc grooves, the diameter of arc groove is identical with the maximum gauge of pull rod, i.e., identical with pull rod convex shoulder outer diameter.
In the process of running, after pull rod is occured bending and deformation by centrifugal force effect, pull rod convex shoulder is with tie rod hole by traditional for gas turbine
Line contact becomes face contact, reduces the stress concentration of tie rod hole contact area, the bulk life time of wheel disc and pull rod is improved, conducive to machine
The safe operation of group.
The present invention also provides a kind of gas turbine circumferential direction rod fastening rotor, gas turbine circumferential direction rod fastening rotor turns including compressor
Subsegment and turbine rotor section, compressor rotor section and turbine rotor section are tensed respectively by several pull rods, by wheel disc end-tooth or
Contact surface transmits torque, and centering is carried out by end-tooth or wheel disc seam allowance；Compressor rotor section passes through a mistake with turbine rotor section
Torsion pass drum barrel is crossed to join together.Gas turbine as described above is respectively adopted in compressor rotor section, turbine rotor section in the present invention
Wheel disc used in circumferential rod fastening rotor realizes that pull rod is contacted with the tie rod hole inner wall on wheel disc for face, reduces tie rod hole contact zone
The stress concentration in domain improves the bulk life time of wheel disc and pull rod, conducive to the safe operation of unit.
The present invention also provides a kind of gas turbine, the gas turbine is turned using gas turbine circumferential direction pull rod as described above
Son.
In conclusion wheel disc, circumferential rod fastening rotor and gas turbine used in the circumferential rod fastening rotor of the present invention, tie rod hole
It to be formed with symmetrical two sections of arc grooves, two sections of arc grooves on the basis of basic circular hole to extending out, and two sections of circular arcs
The internal diameter of slot is equal with the maximum outside diameter of pull rod, i.e., the internal diameter of arc groove is equal with the pull rod convex shoulder outer diameter on pull rod so that
During gas turbine operation, after pull rod is occured bending and deformation by centrifugal force effect, pull rod convex shoulder is contacted with tie rod hole for face, is subtracted
The stress concentration of lower link bar hole contact area improves the bulk life time of wheel disc and pull rod, conducive to the safe operation of unit.So
The present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (6)
1. the wheel disc used in a kind of gas turbine circumferential direction rod fastening rotor, which is characterized in that the wheel disc (1) is equipped with multiple for drawing
The tie rod hole (3) that bar (2) passes through, all tie rod holes (3) are circumferentially uniformly distributed around wheel disc central axis；Each tie rod hole (3) by
It basic circular hole (31) and is formed based on basic circular hole to the arc groove (32) extended out, the diameter of the basic circular hole (31) is more than institute
State the maximum outside diameter on pull rod (2), the arc groove (32) there are two sections and symmetrical, and the center of circle of two sections of arc grooves (32) exists
On the center of circle of the basic circular hole (31) and the vertical join line of wheel disc central axis, the internal diameter of two sections of arc grooves and the pull rod
(2) maximum outside diameter is equal.
2. the wheel disc used in gas turbine circumferential direction rod fastening rotor according to claim 1, it is characterised in that：Two sections of circles
The distance in the center of circle of arc slot (32) to the center of circle of the basic circular hole (31) is equal.
3. the wheel disc used in gas turbine circumferential direction rod fastening rotor according to claim 2, it is characterised in that：The arc groove
(32) the center of circle to the center of circle of the basic circular hole (31) distance respectively with the overall length of the pull rod, the circle of basic circular hole (31)
The heart is directly proportional to the radial distance of the wheel disc central axis and the rotating speed of circumferential rod fastening rotor itself.
4. the wheel disc used in gas turbine circumferential direction rod fastening rotor according to claim 1, it is characterised in that：The pull rod
(2) alternately it is connected with roundlet shell of column (22) by big cylindrical section and is formed, the outer diameter of the big cylindrical section is more than the roundlet shell of column
(22) outer diameter, and the big cylindrical section is located in the tie rod hole (3), the outer diameter of big cylindrical section and the arc groove (32)
Internal diameter is identical.
5. a kind of gas turbine circumferential direction rod fastening rotor, it is characterised in that：The gas turbine circumferential direction rod fastening rotor uses such as right
It is required that the wheel disc used in 1 to claim 4 any one of them gas turbine circumferential direction rod fastening rotor, realizes pull rod (2) and wheel disc
(1) the tie rod hole inner wall on is contacted for face.
6. a kind of gas turbine, it is characterised in that：The gas turbine is circumferentially drawn using gas turbine as claimed in claim 5
Bar rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610634305.7A CN106050312B (en) | 2016-08-04 | 2016-08-04 | Wheel disc, circumferential rod fastening rotor and gas turbine used in circumferential rod fastening rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610634305.7A CN106050312B (en) | 2016-08-04 | 2016-08-04 | Wheel disc, circumferential rod fastening rotor and gas turbine used in circumferential rod fastening rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106050312A CN106050312A (en) | 2016-10-26 |
| CN106050312B true CN106050312B (en) | 2018-07-06 |
Family
ID=57480285
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610634305.7A Active CN106050312B (en) | 2016-08-04 | 2016-08-04 | Wheel disc, circumferential rod fastening rotor and gas turbine used in circumferential rod fastening rotor |
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|---|---|
| CN (1) | CN106050312B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109113795A (en) * | 2018-10-23 | 2019-01-01 | 中国船舶重工集团公司第七0三研究所 | A kind of helium turbine rotor leaf dish |
| CN113027534A (en) * | 2021-04-19 | 2021-06-25 | 清华大学 | Joint surface connecting structure of rotor wheel disc of disc type gas turbine |
| CN113107683B (en) * | 2021-05-25 | 2022-02-01 | 浙江燃创透平机械股份有限公司 | Wheel disc spigot positioning structure of gas turbine rotor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2650017A (en) * | 1948-11-26 | 1953-08-25 | Westinghouse Electric Corp | Gas turbine apparatus |
| CN103334798A (en) * | 2013-07-10 | 2013-10-02 | 南京航空航天大学 | Multi-arc specially-shaped hole |
| CN204716301U (en) * | 2015-03-31 | 2015-10-21 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of turbine wheel disc bar jointing structure |
| CN105041386A (en) * | 2015-07-21 | 2015-11-11 | 南京航空航天大学 | Circular arc and straight line section mixed special-shaped hole |
| CN205895319U (en) * | 2016-08-04 | 2017-01-18 | 上海电气燃气轮机有限公司 | Used rim plate, circumference rod fastening rotor and gas turbine of circumference rod fastening rotor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1150803A (en) * | 1997-08-01 | 1999-02-23 | Mitsubishi Heavy Ind Ltd | Clearance sealing structure of bolt hole for connecting gas turbine disk |
-
2016
- 2016-08-04 CN CN201610634305.7A patent/CN106050312B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2650017A (en) * | 1948-11-26 | 1953-08-25 | Westinghouse Electric Corp | Gas turbine apparatus |
| CN103334798A (en) * | 2013-07-10 | 2013-10-02 | 南京航空航天大学 | Multi-arc specially-shaped hole |
| CN204716301U (en) * | 2015-03-31 | 2015-10-21 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of turbine wheel disc bar jointing structure |
| CN105041386A (en) * | 2015-07-21 | 2015-11-11 | 南京航空航天大学 | Circular arc and straight line section mixed special-shaped hole |
| CN205895319U (en) * | 2016-08-04 | 2017-01-18 | 上海电气燃气轮机有限公司 | Used rim plate, circumference rod fastening rotor and gas turbine of circumference rod fastening rotor |
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| Publication number | Publication date |
|---|---|
| CN106050312A (en) | 2016-10-26 |
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