CN105275955A - Locknut for rotor of gas turbine and machining methods of locknut - Google Patents
Locknut for rotor of gas turbine and machining methods of locknut Download PDFInfo
- Publication number
- CN105275955A CN105275955A CN201510218988.3A CN201510218988A CN105275955A CN 105275955 A CN105275955 A CN 105275955A CN 201510218988 A CN201510218988 A CN 201510218988A CN 105275955 A CN105275955 A CN 105275955A
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- nut body
- nut
- gas turbine
- lock nut
- turbine rotor
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Abstract
The invention belongs to the technical field of locknuts and discloses a locknut for a rotor of a gas turbine. The locknut comprises a recessed part arranged on the outer side face of a nut body, the distance between any point on the recessed part and the center of the nut body is smaller than the radius of the outer side face of the nut body, and the recessed part penetrates the whole nut body in the radial direction. Through the arrangement of the recessed part penetrating the whole nut body in the radial direction on the outer side of the nut body, the recessed part is matched with a protruding shoulder, and the locking function is achieved. The structure of an existing wheel disc is fully used, the structure is simple, assembly and disassembly are convenient, and the anti-looseness self-locking effect is good. The invention discloses two machining methods of the locknut. Multiple recessed parts can be machined at the same time through a tool rotary disc and linear cutting, and the recessed parts are not limited to the contour shape.
Description
Technical field
The present invention relates to lock nut technical field, particularly a kind of gas turbine rotor lock nut and processing method thereof.
Background technique
Gas turbine exsert rod fastening rotor, wheel disc at different levels is combined together by the many stay-bolts distributed by circumference and the nut coordinated with it closely.Stay-bolt not only plays the effect connecting wheel disc, and the radial position of tie rod hole on wheel disc simultaneously also determines the rigidity of whole rotor.From the angle of rigidity, stay-bolt is radial more outward along wheel disc, and the rigidity of whole gas turbine rotor is better.
In order to ensure the integrity of combustion engine rotor, except ensure stay-bolt pretightening force enough except, also to consider screw thread reversion that the reasons such as stay-bolt material creep, shock and vibration, varying load cause and relaxation phenomenon.Pull-rod nut is as the fastening piece of whole combustion engine rotor, and its reliability requirement is very high.Pull-rod nut is once occur getting loose, and the normal operation that the lighter can cause the combustion gas of rotor oscillation dramatic impact to be taken turns, severe one can cause serious accident.Reliably being convenient to dismounting to ensure to connect simultaneously, needing the nut at the method locking stay-bolt two ends adopting machinery locking; As shown in Figure 1, existing pull-rod nut generally adopts round nut 100, and after fixing, the locking mode of recycling machinery is locked it.
Especially for distributed rod fastening rotor, before compressor air inlet machine side pull-rod nut is not positioned at rotor first order wheel disc, but in recess space between wheel disc.Due to limited space, by the restriction of installing space and working rotor rotating speed, a lot of mechanical anti-loose method all can not use, and cannot realize effectively locking object.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: for the pull-rod nut solving existing distributed rod fastening rotor air inlet side is arranged in groove, installing space is limited, realizing dismountable while, cannot realize the problem that machinery is locking.
(2) technological scheme
In order to solve the problems of the technologies described above, the invention provides a kind of gas turbine rotor lock nut, comprise: be arranged at the depressed part on nut body outer side surface, on described depressed part, any point is to the distance at described nut body center, is all less than the radius of described nut body outer side surface; Described depressed part radially runs through whole described nut body.
Wherein, the cross section of described depressed part is the circular arc of evagination or the circular arc of indent.
Wherein, described nut body comprises two depressed parts do not connected mutually.
Wherein, in two described depressed parts, one of them is the circular arc of evagination, and another is the circular arc of indent.
Wherein, the center of two described depressed parts and the center conllinear of described nut body.
Wherein, the joint of described depressed part and described nut body outer side surface is provided with transition arc.
Wherein, one end of described nut body is relative with the wheel disc of gas turbine rotor, and one end of the relatively described wheel disc of described nut body is provided with pad.
Wherein, one end of described nut body is provided with stress relief grooves, and described stress relief grooves is closed annular deep gouge.
The processing method of above-mentioned lock nut, comprises the following steps:
A1: the outside multiple nut body being evenly fixed on frock rotating disk, and being exposed at position to be cut, makes the center line of all nut bodies all with the centerline parallel of described frock rotating disk and apart from equal;
A2: this frock rotating disk is fixed on lathe by three jaw chuck;
A3: location lathe tool, all described nut bodies cut out the evagination circular arc that curvature is equal.
The processing method of above-mentioned lock nut, comprises the following steps:
B1: all nut bodies to be processed are coaxially fixed;
B2: quantity and the profile of determining defective part to be processed;
B3: utilize the wire of Linear cut to cut.
(3) beneficial effect
Technique scheme tool has the following advantages: gas turbine rotor lock nut of the present invention, the depressed part of whole nut body is radially run through by the arranged outside at nut body, matched with convex shoulder adjacent with it by depressed part, prevent nut body autorotation, realize the mechanical interlocking to nut body, realize self-locking; The present invention takes full advantage of the structure of existing wheel disc self, and structure is simple, and easy installation and removal, locking self-locking is effective.The present invention discloses two kinds of processing methods of lock nut, and the first can process multiple simultaneously, and second method can process multiple depressed part simultaneously, and can process the depressed part of differently contoured shape.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing round nut;
Fig. 2 is the plan view of lock nut described in the embodiment of the present invention one;
Fig. 3 is that the A-A of Fig. 2 is to sectional view;
Fig. 4 is the stereogram of lock nut described in the embodiment of the present invention one;
Fig. 5 is one of using state figure of lock nut described in the embodiment of the present invention one;
Fig. 6 is the close-up schematic view of Fig. 5;
Fig. 7 is the plan view of lock nut described in the embodiment of the present invention two;
Fig. 8 is the sectional view of lock nut described in the embodiment of the present invention three;
Fig. 9 is the using state figure bis-of lock nut described in the embodiment of the present invention one;
Figure 10 is the clamping of lock nut described in the embodiment of the present invention one on lathe and machining sketch chart;
Figure 11 is the linear cutter schematic diagram of lock nut described in the embodiment of the present invention one.
Wherein, 1, wheel disc; 2, nut body; 3, stay-bolt; 6, frock rotating disk; 9, wire; 10, convex shoulder; 15, lathe tool; 16, three jaw chuck; 21, stress relief grooves; 30, rod fastening rotor; 100, round nut; 200, depressed part.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
In describing the invention, it should be noted that, except as otherwise noted, the implication of " multiple " is two or more; Term " on ", D score, "left", "right", " interior ", " outward ", " front end ", " rear end ", " head ", the orientation of the instruction such as " afterbody " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " etc. only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, also it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, visual concrete condition understands above-mentioned term concrete meaning in the present invention.
As in Figure 2-4, the present invention discloses a kind of gas turbine rotor lock nut, it comprises: be arranged at the depressed part 200 on nut body 2 outer side surface, and on described depressed part 200, any point is to the distance at described nut body 2 center, is all less than the radius of described nut body 2 outer side surface; Described depressed part 200 radially runs through whole described nut body 2.The profile of depressed part 200 can be determined according to the installation environment of this lock nut, can be circular arc, straight line or other irregular contours, as long as can coordinate with external equipment, avoids nut body 2 to rotate, can realize locking object.
Embodiment one:
As illustrated in Figures 5 and 6, the cross section of described depressed part 200 is the circular arc of evagination or the circular arc of indent.Described depressed part 200 is provided with transition arc with the joint of described nut body 2 outer side surface.During installation, between adjacent two convex shoulders 10 this lock nut being put into wheel disc 1 end, two convex shoulders 10 are annular, in the groove of this lock nut between two described annular convex shoulders 10, depressed part 200 matches with the convex shoulder 10 in outside, namely depressed part 200 is the circular arc of evagination, and this circular arc is identical with the curvature of the inwall of outside convex shoulder 10; One end of stay-bolt 3 is connected with this lock nut, and the other end, after Hydraulic Pretension Method, is connected with common nut, and the mode then using machinery locking, by common fastening nuts, realizes Drop-proof.Certainly, also depressed part 200 can be arranged on the place connected with inner side convex shoulder 10, concave circular arc in being set to by depressed part 200 to match with the cylindrical of interior survey convex shoulder 10, realizes object that is locking, Drop-proof.Because depressed part 200 and convex shoulder 10 connecting part match, area of contact is large, can avoid phenomenon nut body 2 occurring stress is concentrated, be conducive to the working life extending this lock nut, ensures to realize object that is locking, Drop-proof.Transition arc the generation can avoiding stress concentration phenomenon is further set.
Embodiment two:
As shown in Figure 7, the present embodiment is substantially identical with embodiment one, and difference is only, described nut body 2 comprises two depressed parts 200 do not connected mutually.Preferably, in two described depressed parts 200, one of them is the circular arc of evagination, and another is the circular arc of indent.Match with the convex shoulder 10 of its both sides respectively by the depressed part of two on nut body 2 200, realize two places locking, anti-loosing effect is better; Stress is disperseed, and nut body 2 is not yielding, and anti-loosing effect is good.Preferably, the center of two described depressed parts 200 and the center conllinear of described nut body 2; To facilitate processing.
This embodiment only gives the mode of execution that depressed part 200 is respectively evagination circular arc and interior concave circular arc, itself and combination also belong to protection scope of the present invention, such as two are evagination circular arc or are both interior concave circular arcs.
Embodiment three:
As shown in Figure 8, the present embodiment is substantially identical with embodiment one or two, and difference is only, one end of described nut body 2 is provided with stress relief grooves 21, and described stress relief grooves 21 is closed annular deep gouge.Namely one annular groove is set in one end of nut body 2, this groove between the screw thread and outer side surface of nut body 2, as stress relief grooves 21; Several worm tooths due to nut body 2 end are stressed comparatively large, therefore the stress relief grooves 21 in its arranged outside, make these worm tooths can have outside, a little distortion, to extenuate the active force that worm tooth is subject to, prevent worm tooth from damaging.
Preferably, one end of described nut body 2 is relative with the wheel disc 1 of gas turbine rotor, and one end of the relatively described wheel disc 1 of described nut body 2 is provided with pad; Namely the combination of flat gasket, compression spring or two kinds of pads is set between nut body 2 and wheel disc 1; When being designed with fillet between convex shoulder 10 and wheel disc 1, by changing the thickness of pad, the axial position that adjusting nut body 2 coordinates with wheel disc 1, prevent the end face because of nut body 2 from cannot contact with wheel disc 1 and affecting the fastening effect of nut body 2, guarantee depressed part 200 and convex shoulder 10 close contact, avoid nut body 2 to rotate.
Jin You one end, stay-bolt 3 two ends adopts locking nut of the present invention.As shown in Figure 9, multiple wheel disc 1 or revolving meber are connected by the nut at stay-bolt 3 and two ends by exsert rod fastening rotor 30.When rod fastening rotor 30 is installed, fixes described lock nut at wheel disc 1 and the assembling side place of this lock nut, between lock nut and convex shoulder 10 within the scope of tolerance fit, a small amount of gap can be there is.Stay-bolt 3 is screwed into described lock nut from the opposite side of the wheel disc 1 coordinated with it by tie rod hole.After other connected pieces complete to be assembled, the stay-bolt 3 coordinated with described lock nut reaches appointment elongation by hydraulic elongator pretension, and the nut tightening stay-bolt 3 the other end can realize the assembling of rotor.
Gas turbine rotor lock nut of the present invention, the structural feature of wheel disc 1 taking full advantage of exsert rod fastening rotor 30 and assemble with it, devise depressed part 200, depressed part 200 is coordinated with convex shoulder 10, both stay-bolt 3 had been made radially to improve the rigidity of rotor, again by restriction nut rotation, improve the reliability that stay-bolt 3 is connected with lock nut, the phenomenon that gets loose that avoiding works long hours causes.
As shown in Figure 10, the present invention also disclosed the processing method of lock nut described in above-described embodiment, comprises the following steps:
A1: the outside multiple nut body 2 being evenly fixed on frock rotating disk 6, and being exposed at position to be cut, makes the center line of all nut bodies 2 all with the centerline parallel of described frock rotating disk 6 and apart from equal; According to nut body 2 installation environment in use, determine the radius of nut place circumference, then select the frock rotating disk 6 of suitable dimension; Then according to the curvature inside convex shoulder 10, the cutting position of lathe tool 15 is determined.
A2: this frock rotating disk 6 is fixed on lathe by three jaw chuck 16;
A3: location lathe tool 15, all described nut bodies 2 cut out the equal evagination circular arc of curvature.
Nut body 2 can multiple one group of circumference clamping on the same Radius of frock rotating disk 6, by the rotation motion of frock rotating disk 6 or three jaw chuck 16, lathe or milling machine process the identical depressed part of curvature 200 simultaneously.
This processing method can only be applicable to only have a depressed part 200 described in embodiment one, and depressed part 200 is the processing of the lock nut of evagination circular arc.
As shown in figure 11, the present invention also disclosed the processing method of another kind of above-mentioned lock nut, comprises the following steps:
B1: all nut bodies 2 to be processed are coaxially fixed; Preferably all nut bodies 2 are tightened on same threaded stem, make all nut bodies 2 coaxial, and integral-rotation and relative rotation can not occur;
B2: quantity and the profile of determining defective part to be processed; According to user demand, determine that the quantity of defective part is one, two or more, and by the main frame of the profile line parameters input linear cutting machine of corresponding defective part;
B3: utilize the wire 9 of Linear cut to cut.
This processing method can process various quantity and differently contoured depressed part 200, and difficulty of processing is low, and precision is high, is applicable to extensively promoting the use of.
As can be seen from the above embodiments, lock nut of the present invention, depressed part 200 is offered by the side of the nut body 2 in existing round nut 100 formula, so that convex shoulder 10 coordinates the mechanical type self-locking anti-loosing realizing nut body 2, ensure that and the reliability that stay-bolt 3 connects further enhancing the Security of combustion engine rotor; The quantity of depressed part 200 and profile are determined according to the installation environment of this lock nut, guarantee that all defect portion all can match with corresponding convex shoulder 10, avoid occurring stress concentration phenomenon; Depressed part 200 is provided with transition arc with the joint of described nut body 2 outer side surface, has extenuated stress concentration phenomenon further; One end of nut body 2 is provided with stress relief grooves 21, and the worm tooth of end can be avoided to accept excessive and produce distortion; Arranging of pad can regulate the distance between nut body 2 and convex shoulder 10, wheel disc 1 end face, guarantees to realize locking object.The present invention also disclosed the processing method of two kinds of these lock nuts, the first adopts frock rotating disk 6 to fix with three jaw chuck 16, the object of the defective part of simultaneously processing multiple nut body 2 can be realized, but the lock nut that depressed part 200 is evagination circular arc can only be processed; The processing method of another kind of lock nut adopts Linear cut to realize, the method is not by the quantity of depressed part 200 and the restriction of contour shape, can process and variously there is multiple depressed part 200 and the different nut body 2 of depressed part 200 contour shape, difficulty of processing is low, manufacturing efficiency is high, can extensively promote the use of.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and replacement, these improve and replace and also should be considered as protection scope of the present invention.
Claims (10)
1. a gas turbine rotor lock nut, it is characterized in that, comprise: be arranged at the depressed part (200) on nut body (2) outer side surface, the upper any point of described depressed part (200), to the distance at described nut body (2) center, is all less than the radius of described nut body (2) outer side surface; Described depressed part (200) radially runs through whole described nut body (2).
2. gas turbine rotor lock nut as claimed in claim 1, it is characterized in that, the cross section of described depressed part (200) is the circular arc of evagination or the circular arc of indent.
3. gas turbine rotor lock nut as claimed in claim 1, is characterized in that, described nut body (2) comprises two depressed parts (200) do not connected mutually.
4. gas turbine rotor lock nut as claimed in claim 3, it is characterized in that, in two described depressed parts (200), one of them is the circular arc of evagination, and another is the circular arc of indent.
5. gas turbine rotor lock nut as claimed in claim 4, is characterized in that, the center of two described depressed parts (200) and the center conllinear of described nut body (2).
6. gas turbine rotor lock nut as claimed in claim 1, is characterized in that, described depressed part (200) is provided with transition arc with the joint of described nut body (2) outer side surface.
7. gas turbine rotor lock nut as claimed in claim 6, it is characterized in that, one end of described nut body (2) is relative with the wheel disc (1) of gas turbine rotor, and one end of the relatively described wheel disc (1) of described nut body (2) is provided with pad.
8. gas turbine rotor lock nut as claimed in claim 1, it is characterized in that, one end of described nut body (2) is provided with stress relief grooves (21), and described stress relief grooves (21) is closed annular deep gouge.
9. the processing method of lock nut as described in any one of claim 1-8, is characterized in that, comprise the following steps:
A1: the outside multiple nut body (2) being evenly fixed on frock rotating disk (6), and position to be cut is exposed, make the center line of all nut bodies (2) all with the centerline parallel of described frock rotating disk (6) and apart from equal;
A2: this frock rotating disk (6) is fixed on lathe by three jaw chuck (16);
A3: location lathe tool (15), all described nut bodies (2) cut out the equal evagination circular arc of curvature.
10. the processing method of lock nut as described in any one of claim 1-8, is characterized in that, comprise the following steps:
B1: all nut bodies to be processed (2) are coaxially fixed;
B2: quantity and the profile of determining defective part to be processed;
B3: utilize the wire of Linear cut (9) to cut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510218988.3A CN105275955A (en) | 2015-04-30 | 2015-04-30 | Locknut for rotor of gas turbine and machining methods of locknut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510218988.3A CN105275955A (en) | 2015-04-30 | 2015-04-30 | Locknut for rotor of gas turbine and machining methods of locknut |
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| Publication Number | Publication Date |
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| CN105275955A true CN105275955A (en) | 2016-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510218988.3A Pending CN105275955A (en) | 2015-04-30 | 2015-04-30 | Locknut for rotor of gas turbine and machining methods of locknut |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834686A (en) * | 2016-04-26 | 2016-08-10 | 苏州昭沃五金科技有限公司 | Manufacturing process for connecting nut |
| CN107553073A (en) * | 2017-09-26 | 2018-01-09 | 苏州阿清智能科技有限公司 | A kind of same axis processing technique and assembly technology of discrete revolving support part |
| CN110814721A (en) * | 2018-08-10 | 2020-02-21 | 波音公司 | Fastener alignment system, fastener alignment kit, and related methods |
| CN111553033A (en) * | 2020-04-28 | 2020-08-18 | 哈尔滨工业大学 | Equivalent reduction processing method of heavy-duty gas turbine tie-rod rotor model based on strain energy method |
| CN112643160A (en) * | 2020-12-25 | 2021-04-13 | 航天精工股份有限公司 | Discontinuity inspection sample preparation device for high lock nut |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105834686A (en) * | 2016-04-26 | 2016-08-10 | 苏州昭沃五金科技有限公司 | Manufacturing process for connecting nut |
| CN107553073A (en) * | 2017-09-26 | 2018-01-09 | 苏州阿清智能科技有限公司 | A kind of same axis processing technique and assembly technology of discrete revolving support part |
| CN110814721A (en) * | 2018-08-10 | 2020-02-21 | 波音公司 | Fastener alignment system, fastener alignment kit, and related methods |
| CN110814721B (en) * | 2018-08-10 | 2023-09-01 | 波音公司 | Fastener alignment system, fastener alignment kit, and related methods |
| CN111553033A (en) * | 2020-04-28 | 2020-08-18 | 哈尔滨工业大学 | Equivalent reduction processing method of heavy-duty gas turbine tie-rod rotor model based on strain energy method |
| CN111553033B (en) * | 2020-04-28 | 2022-07-05 | 哈尔滨工业大学 | Equivalent reduction processing method of heavy-duty gas turbine tie rod rotor model based on strain energy method |
| CN112643160A (en) * | 2020-12-25 | 2021-04-13 | 航天精工股份有限公司 | Discontinuity inspection sample preparation device for high lock nut |
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Application publication date: 20160127 |