CN112091540A - Wind power ring blank capable of reducing stress concentration and preparation process thereof - Google Patents
Wind power ring blank capable of reducing stress concentration and preparation process thereof Download PDFInfo
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- CN112091540A CN112091540A CN202010911507.8A CN202010911507A CN112091540A CN 112091540 A CN112091540 A CN 112091540A CN 202010911507 A CN202010911507 A CN 202010911507A CN 112091540 A CN112091540 A CN 112091540A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a wind power ring part blank for reducing stress concentration and a preparation process thereof, wherein an inner sleeve is in interference fit with the inner wall of a ring part main body, the assembled wind power ring part blank is more tightly connected, a positioning hole is matched with a first threaded hole, a locking bolt arranged at the positioning hole ensures the connection tightness of the wind power ring part blank and can effectively reduce the stress concentration, when the wind power ring part blank is prepared, the ring part main body and the inner sleeve blank are firstly prepared, then the ring part main body and the inner sleeve blank are roughly turned, then the quenching and tempering treatment are carried out, then the finish machining is carried out, then the stress relief annealing is carried out, the stress relief annealing can eliminate the stress and can ensure the hardness of the inner sleeve, then the natural cooling and the assembly of the inner sleeve are carried out, the interference fit enables the connection of the ring part blank to be more tight, and the stress concentration phenomenon of the whole wind power ring part blank after being installed, the strength is high, and meanwhile, the preparation process of the wind power ring blank is simple.
Description
Technical Field
The invention relates to a wind power part, in particular to a wind power ring blank for reducing stress concentration and a preparation process thereof.
Background
Wind power generation refers to converting kinetic energy of wind into electric energy. Wind energy is a clean and pollution-free renewable energy source, and is used by people for a long time, mainly by pumping water, grinding surfaces and the like through windmills, and people are interested in how to use wind to generate electricity. Although wind generators are diverse, they can be classified into two categories: firstly, a horizontal axis wind driven generator, wherein a rotating shaft of a wind wheel is parallel to the wind direction; and the rotating shaft of the wind wheel is vertical to the ground or the airflow direction.
A horizontal axis wind turbine and a vertical axis wind turbine used in wind power generation both need special wind power rings. The wind power ring piece plays an important role in a wind power system, the stability of the wind power ring piece is particularly important, the wind power ring piece is subjected to great moment when equipment runs, the strength of the existing wind power ring piece is difficult to meet the requirement, and meanwhile, the wind power ring piece has a large stress concentration phenomenon during preparation, so that the stability of the wind power equipment is influenced.
Disclosure of Invention
The invention aims to provide a wind power ring blank capable of reducing stress concentration and a preparation process thereof.
In order to achieve the purpose, the invention provides the following technical scheme:
the wind power ring part blank capable of reducing stress concentration comprises a ring part main body and an inner sleeve, wherein the inner sleeve is assembled on the inner side of the ring part main body, tooth grooves which are uniformly distributed are formed in the inner side of the inner sleeve, a limiting ring is formed in the edge of the inner sleeve and is in contact with the surface wall of the ring part main body, position indicating grooves are formed in the upper surface and the lower surface of the ring part main body, and a first threaded hole and a second threaded hole are formed in the upper surface of the ring part main body.
Preferably, the limiting ring is provided with positioning holes which are uniformly distributed, and the positioning holes are positioned above the first threaded holes.
Preferably, chamfers are arranged at the inner edge and the outer edge of the ring main body.
Preferably, the inner sleeve is in interference fit with the inner wall of the ring body.
Preferably, a stepped ring groove is formed in the upper surface of the ring main body, the first threaded hole is formed in the stepped ring groove, and the stepped ring groove is in contact with the limit ring.
The invention provides a preparation process of a wind power ring blank for reducing stress concentration, which comprises the following steps:
s1: preparing a ring main body and an inner sleeve blank, wherein C, Mn, Cr, Si, Mo, V, Fe and Ni are mixed according to a proportion and poured into a smelting furnace with the temperature of 1550 ℃ to be smelted into molten steel, and then the ring main body and the inner sleeve blank are cast;
s2: roughly turning the ring body and the inner sleeve blank, wherein the ring body blank is clamped and aligned according to the design requirement, a position indicating groove, a threaded hole and a stepped ring groove on the end face of the ring body are machined, chamfering is carried out on the edge of the end face, and meanwhile, drilling and grooving are carried out on the inner sleeve 2 according to the design requirement;
s3: quenching and tempering, namely quenching and then performing high-temperature tempering, wherein the ring piece main body blank and the inner sleeve blank are placed in a vacuum furnace for vacuum quenching, and the rapidly cooled ring piece main body blank and the rapidly cooled inner sleeve blank are placed in a tempering furnace for high-temperature tempering;
s4: performing finish machining, namely performing secondary machining on the ring body and the inner sleeve blank subjected to thermal refining according to the size requirement to ensure the tolerance and roughness requirements of corresponding sizes;
s5: stress relief annealing, namely placing the inner sleeve blank subjected to quenching and tempering in a stress relief annealing device for stress relief annealing, and controlling the temperature at 300-400 ℃, so that the stress can be eliminated and the hardness of the inner sleeve can be ensured;
s6: naturally cooling, namely naturally cooling the inner sleeve blank treated by the stress relief annealing process at the ambient temperature;
s7: assembling the inner sleeve, namely placing the ring main body at a preset installation position, wherein one surface of the ring main body, which is provided with the threaded hole, faces upwards, hoisting the inner sleeve by using a hoisting device, hoisting the inner sleeve into a liquid nitrogen bin, carrying out ultra-low temperature cooling on the inner sleeve by using the liquid nitrogen for 15-20 minutes, and then installing the inner sleeve subjected to ultra-low temperature treatment on the inner side of the ring main body;
s8: and locking the inner sleeve, and installing a locking bolt into the positioning hole and the first threaded hole after the inner sleeve is assembled.
Preferably, in S7, when the inner sleeve is mounted on the inner side of the ring body, it is required to ensure that the positioning hole is located above the first threaded hole.
Preferably, in the step S3, the temperature of vacuum quenching is maintained at 850 ℃ to 900 ℃, the quenching medium of vacuum quenching is selected from inert gas, and the temperature of high-temperature tempering is controlled at 350 ℃ to 400 ℃.
Preferably, the surface roughness of the ring body after finishing and heat treatment is less than 1.5 microns.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a wind power ring part blank for reducing stress concentration and a preparation process thereof, wherein the inner sleeve is in interference fit with the inner wall of the ring part main body, so that the assembled wind power ring part blank is more tightly connected, a positioning hole is matched with a first threaded hole, a locking bolt arranged at the positioning hole ensures the connection tightness of the wind power ring part blank and can effectively reduce stress concentration, when the wind power ring part blank is prepared, the ring part main body and the inner sleeve blank are firstly prepared, then the ring part main body and the inner sleeve blank are roughly turned, then the quenching and tempering treatment are carried out, then the finish machining is carried out, then the stress relief annealing is carried out, the stress relief annealing can eliminate stress and can ensure the hardness of the inner sleeve, then the natural cooling and the assembly of the inner sleeve are carried out, the interference fit enables the ring part blank to be more tightly connected, and the stress concentration phenomenon of the whole wind power ring part blank after being installed is, the strength is high, and meanwhile, the preparation process of the wind power ring blank is simple.
Drawings
FIG. 1 is an exploded view of the overall structure of the present invention;
FIG. 2 is a schematic view of the overall structure of the present invention;
FIG. 3 is a schematic view of a ring body of the present invention;
FIG. 4 is a schematic view of the inner sleeve of the present invention;
FIG. 5 is a flow chart of the manufacturing process of the present invention.
In the figure: 1. a ring body; 11. a position indicating groove; 12. a first threaded hole; 13. a second threaded hole; 14. a stepped ring groove; 2. an inner sleeve; 21. a tooth socket; 22. a limiting ring; 221. and (7) positioning the holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a wind power ring blank for reducing stress concentration includes a ring main body 1 and an inner sleeve 2, the inner sleeve 2 is assembled at the inner side of the ring main body 1, the inner sleeve 2 is in interference fit with the inner wall of the ring main body 1, so that the assembled wind power ring blank is more tightly connected, the inner side of the inner sleeve 2 is provided with uniformly distributed tooth sockets 21, the tooth sockets 21 are arranged for connecting other workpieces, the edge of the inner sleeve 2 is provided with a limit ring 22, the limit ring 22 is provided with uniformly distributed positioning holes 221, the positioning holes 221 are located above the first threaded holes 12, wherein when the inner sleeve 2 is assembled at the inner side of the ring main body 1, matching between the positioning holes 221 and the first threaded holes 12 needs to be ensured, then locking bolts are installed at the positioning holes 221, and are connected with the first threaded holes 12, so that tight connection of the wind power ring blank is ensured, meanwhile, stress concentration can be effectively reduced, the limiting ring 22 is in contact with the surface wall of the ring main body 1, chamfers are arranged at the inner edge and the outer edge of the ring main body 1, and therefore stress concentration can be effectively reduced, the position indicating grooves 11 are formed in the upper surface and the lower surface of the ring main body 1, the position indicating grooves 11 are used for indicating positions, and subsequent installation is facilitated, the first threaded hole 12 and the second threaded hole 13 are formed in the upper surface of the ring main body 1, the stepped ring groove 14 is formed in the upper surface of the ring main body 1, the first threaded hole 12 is arranged on the stepped ring groove 14, and the stepped ring groove 14 is in contact with the; compared with the traditional parts, the stress concentration phenomenon of the whole wind power ring part blank is obviously reduced after the wind power ring part blank is installed, wherein the wind power ring part blank is composed of a ring part main body 1 and an inner sleeve 2, the inner sleeve 2 is connected with the ring part main body 1 in an interference fit mode, meanwhile, matching of a positioning hole 221 and a first threaded hole 12 is guaranteed, then a locking bolt is installed at the positioning hole 221, and meanwhile, the locking bolt is connected with the first threaded hole 12, so that the connection tightness of the wind power ring part blank is guaranteed, and meanwhile, the stress concentration can be effectively reduced.
Referring to fig. 5, a process for manufacturing a wind power ring blank with reduced stress concentration includes the following steps:
the first step is as follows: preparing blanks of the ring main body 1 and the inner sleeve 2, wherein C, Mn, Cr, Si, Mo, V, Fe, Ni and other materials are mixed according to a proportion and poured into a smelting furnace with the temperature of 1550 ℃ to be smelted into molten steel, and then the blanks of the ring main body 1 and the inner sleeve 2 are cast into the blanks of the ring main body 1 and the inner sleeve 2, wherein the temperature of the blanks of the ring main body 1 and the inner sleeve 2 is extremely high, and the subsequent operation safety needs to be ensured;
the second step is that: rough turning is carried out on the ring main body 1 and the inner sleeve 2 blank, the ring main body 1 and the inner sleeve 2 blank are required to be ensured to be cooled completely before rough turning is carried out, safety accidents caused by high temperature are avoided, wherein the ring main body 1 blank is clamped and aligned according to design requirements, a position indicating groove 11, a threaded hole and a stepped ring groove 14 on the end face of the ring main body 1 are machined, chamfering processing is carried out on the edge of the end face, meanwhile, drilling and grooving processing are carried out on the inner sleeve 2 according to the design requirements, and chamfering processing is also required when the ring main body 1 is rough turned, so that the stress concentration phenomenon can be further reduced;
the third step: quenching and tempering, namely quenching and then high-temperature tempering, wherein the ring body 1 and the inner sleeve 2 blanks after quenching and tempering have higher strength and excellent toughness, plasticity and cutting performance, the ring body 1 and the inner sleeve 2 blanks are placed in a vacuum furnace for vacuum quenching, the temperature of the vacuum quenching is kept at 850-900 ℃, the quenching medium of the vacuum quenching adopts inert gas, the ring body 1 and the inner sleeve 2 blanks after rapid cooling are placed in a tempering furnace for high-temperature tempering, the temperature of the high-temperature tempering is controlled within the range of 350-400 ℃, the humidity of the ring body 1 and the inner sleeve 2 blanks during the high-temperature tempering is less than 50 percent, the vacuum degree is less than 10pa, the metallographic phase of the ring body 1 and the inner sleeve 2 blanks is austenite at the temperature of 850-900 ℃, the austenite is transformed into martensite or bainite after quenching, the blanks of the main body 1 and the inner sleeve 2 of the cutter ring piece are subjected to high-temperature tempering process treatment within the range of 350-400 ℃, so that the rigidity, hardness and toughness of the blanks of the main body 1 and the inner sleeve 2 of the cutter ring piece can be improved;
the fourth step: finish machining, namely performing secondary machining on the ring main body 1 and the inner sleeve 2 blanks subjected to thermal refining according to the size requirement to ensure the tolerance and roughness requirement of corresponding sizes, wherein the ring main body 1 and the inner sleeve 2 blanks can generate slight thermal deformation in the process of heat treatment, the sizes of the ring main body 1 and the inner sleeve 2 blanks can be ensured through finish machining to meet the machining size requirement, and the surface roughness of the ring main body 1 is smaller than 1.5 micrometers after the ring main body 1 is subjected to finish machining and heat treatment, so that the running stability of parts is reduced;
the fifth step: stress relief annealing, namely placing the inner sleeve 2 blank subjected to quenching and tempering in a stress relief annealing device for stress relief annealing, wherein the temperature is controlled at 400 ℃ to eliminate the stress and ensure the hardness of the inner sleeve 2, the stress relief annealing can eliminate the stress and prevent the tooth grooves 21 on the inner sleeve 2 from cracking, the workpiece is easy to deform due to the large residual stress generated during quenching, so that the residual stress can be effectively reduced by annealing, and the temperature is controlled at 400 ℃ to eliminate the stress and ensure the hardness of the inner sleeve 2;
and a sixth step: naturally cooling, namely naturally cooling the inner sleeve 2 blank treated by the stress relief annealing process at an ambient temperature, wherein the hardness value of the inner sleeve 2 after natural cooling is HRC50-55, so that the practical requirement of wind power is met;
the seventh step: assembling an inner sleeve 2, namely placing a ring main body 1 at a preset installation position, wherein one surface of the ring main body 1 provided with a threaded hole faces upwards, then hoisting the inner sleeve 2 through a hoisting device, hoisting the inner sleeve 2 into a liquid nitrogen bin, carrying out ultralow temperature cooling on the inner sleeve 2 by using the liquid nitrogen for 15-20 minutes, then installing the inner sleeve 2 subjected to ultralow temperature treatment on the inner side of the ring main body 1, wherein the inner sleeve 2 is in interference fit with the inner wall of the ring main body 1, so that the assembled wind power ring blank is more tightly connected;
eighth step: after the inner sleeve 2 is locked, the locking bolt is installed in the positioning hole 221 and the first threaded hole 12 after the inner sleeve 2 is assembled, and meanwhile the locking bolt is connected with the first threaded hole 12, so that the connection tightness of the wind power ring blank is ensured, and meanwhile, stress concentration can be effectively reduced.
The wind power ring piece blank for reducing stress concentration comprises a ring piece main body 1 and an inner sleeve 2, wherein the inner sleeve 2 is assembled on the inner side of the ring piece main body 1, the inner sleeve 2 is in interference fit with the inner wall of the ring piece main body 1, the wind power ring piece blank after being assembled is connected more tightly, tooth grooves 21 which are uniformly distributed are formed in the inner side of the inner sleeve 2, a limit ring 22 is formed in the edge of the inner sleeve 2, positioning holes 221 which are uniformly distributed are formed in the limit ring 22, and the positioning holes 221 are positioned above first threaded holes 12, wherein when the inner sleeve 2 is assembled on the inner side of the ring piece main body 1, the positioning holes 221 are matched with the first threaded holes 12, locking bolts are installed at the positioning holes 221 and are connected with the first threaded holes 12, so that the connection tightness of the wind power ring piece blank is ensured, and the stress concentration can be effectively reduced, the chamfer is all seted up to the interior outer edge of ring main part 1, can effectual reduction stress concentration like this, compares its stress concentration phenomenon of traditional part and has obvious reduction after whole wind-powered electricity generation ring embryo spare installation, and this reduces the preparation technology of stress concentration's wind-powered electricity generation ring embryo spare, includes following step: firstly preparing blanks of a ring body 1 and an inner sleeve 2, then roughly turning the blanks of the ring body 1 and the inner sleeve 2, then carrying out thermal refining, namely quenching and then tempering at high temperature, wherein the blanks of the ring body 1 and the inner sleeve 2 after thermal refining have high strength and excellent toughness, plasticity and cutting performance, and then carrying out finish machining, because the blanks of the ring body 1 and the inner sleeve 2 can generate slight thermal deformation in the process of thermal treatment, the size of the blanks of the ring body 1 and the inner sleeve 2 can be ensured by finish machining to meet the requirement of machining size, then carrying out stress relief annealing on the blanks, and placing the blanks of the inner sleeve 2 after thermal refining in a stress relief annealing device for stress relief annealing, because the workpieces can generate large residual stress during quenching, the workpieces are easy to deform, so the residual stress can be effectively reduced by annealing, therefore, stress can be eliminated, the hardness of the inner sleeve 2 can be guaranteed, then the inner sleeve 2 is naturally cooled and assembled, the inner sleeve 2 is in interference fit with the inner wall of the ring main body 1, the assembled wind power ring blank is connected more tightly, after the inner sleeve 2 is assembled, the locking bolt is installed in the positioning hole 221 and the first threaded hole 12 and is connected with the first threaded hole 12, the connection tightness of the wind power ring blank is guaranteed, and meanwhile stress concentration can be effectively reduced.
In summary, according to the wind power ring blank for reducing stress concentration and the preparation process thereof provided by the invention, the inner sleeve 2 is in interference fit with the inner wall of the ring main body 1, so that the assembled wind power ring blank is more tightly connected, wherein the positioning hole 221 is matched with the first threaded hole 12, the locking bolt arranged at the positioning hole 221 ensures the connection tightness of the wind power ring blank, and can effectively reduce stress concentration, when the wind power ring blank is prepared, the ring main body 1 and the inner sleeve 2 blank are prepared, then the ring main body 1 and the inner sleeve 2 blank are roughly turned, then thermal refining is performed, then fine machining is performed, then stress relief annealing is performed, the stress relief annealing can eliminate stress and ensure the hardness of the inner sleeve 2, then natural cooling and the assembly of the inner sleeve 2 are performed, and the interference fit enables the wind power ring blank to be more tightly connected, compared with the traditional parts, the whole wind power ring blank has the advantages that the stress concentration phenomenon is obviously reduced after the wind power ring blank is installed, the strength is high, and meanwhile, the manufacturing process of the wind power ring blank is simpler.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (9)
1. The utility model provides a reduce wind-powered electricity generation ring spare of stress concentration, includes ring main part (1) and endotheca (2), its characterized in that: the ring piece is characterized in that the inner sleeve (2) is assembled on the inner side of the ring piece main body (1), tooth grooves (21) which are uniformly distributed are formed in the inner side of the inner sleeve (2), a limiting ring (22) is formed in the edge of the inner sleeve (2), the limiting ring (22) is in contact with the surface wall of the ring piece main body (1), position indicating grooves (11) are formed in the upper surface and the lower surface of the ring piece main body (1), and a first threaded hole (12) and a second threaded hole (13) are formed in the upper surface of the ring piece main body (1).
2. The wind power ring blank for reducing stress concentration according to claim 1, wherein: the limiting ring (22) is provided with positioning holes (221) which are uniformly distributed, and the positioning holes (221) are located above the first threaded holes (12).
3. The wind power ring blank for reducing stress concentration according to claim 1, wherein: chamfers are arranged at the inner edge and the outer edge of the ring main body (1).
4. The wind power ring blank for reducing stress concentration according to claim 1, wherein: the inner sleeve (2) is in interference fit with the inner wall of the ring body (1).
5. The wind power ring blank for reducing stress concentration according to claim 1, wherein: the upper surface of the ring main body (1) is provided with a stepped ring groove (14), the first threaded hole (12) is arranged on the stepped ring groove (14), and the stepped ring groove (14) is in contact with the limiting ring (22).
6. The preparation process of the wind power ring blank for reducing stress concentration according to claim 1, characterized by comprising the following steps:
s1: preparing blanks of the ring main body (1) and the inner sleeve (2), wherein C, Mn, Cr, Si, Mo, V, Fe and Ni are mixed according to a proportion and poured into a smelting furnace with the temperature of 1550 ℃ to be smelted into molten steel, and then the blanks of the ring main body (1) and the inner sleeve (2) are prepared by pouring;
s2: rough turning is carried out on the ring main body (1) and the inner sleeve (2) blank, wherein the ring main body (1) blank is clamped and aligned according to design requirements, a position indicating groove (11), a threaded hole and a stepped ring groove (14) on the end face of the ring main body (1) are machined, chamfering processing is carried out on the edge of the end face, and meanwhile drilling and grooving processing is carried out on the inner sleeve (2) according to the design requirements;
s3: quenching and tempering, namely quenching and then performing high-temperature tempering, wherein the ring main body (1) blank and the inner sleeve (2) blank are placed in a vacuum furnace for vacuum quenching, and the rapidly cooled ring main body (1) blank and the rapidly cooled inner sleeve (2) blank are placed in a tempering furnace for high-temperature tempering;
s4: finish machining, namely performing secondary machining on the ring body (1) and the inner sleeve (2) blanks subjected to quenching and tempering according to the size requirement to ensure the tolerance and roughness requirements of corresponding sizes;
s5: stress relief annealing, namely placing the inner sleeve (2) blank subjected to quenching and tempering in a stress relief annealing device for stress relief annealing, and controlling the temperature at 300-400 ℃, so that the stress can be eliminated and the hardness of the inner sleeve (2) can be ensured;
s6: naturally cooling, namely naturally cooling the inner sleeve (2) blank treated by the stress relief annealing process at the ambient temperature;
s7: assembling an inner sleeve (2), namely placing a ring member main body (1) at a preset installation position, wherein one surface of the ring member main body (1) provided with a threaded hole faces upwards, hoisting the inner sleeve (2) through a hoisting device, hoisting the inner sleeve (2) into a liquid nitrogen bin, carrying out ultralow-temperature cooling on the inner sleeve (2) by using liquid nitrogen for 15-20 minutes, and then installing the inner sleeve (2) subjected to ultralow-temperature treatment on the inner side of the ring member main body (1);
s8: and (3) locking the inner sleeve (2), and installing a locking bolt into the positioning hole (221) and the first threaded hole (12) after the inner sleeve (2) is assembled.
7. The process for manufacturing wind power ring blank with reduced stress concentration according to claim 6, wherein in step S7, when the inner sleeve (2) is installed inside the ring body (1), it is required to ensure that the positioning hole (221) is located above the first threaded hole (12).
8. The process for preparing a wind power ring blank for reducing stress concentration according to claim 6, wherein in S3, the temperature of vacuum quenching is kept at 850-900 ℃, the quenching medium of vacuum quenching is selected from inert gas, and the temperature of high-temperature tempering is controlled at 350-400 ℃.
9. The process for preparing a wind power ring blank capable of reducing stress concentration according to claim 6, wherein the surface roughness of the ring body (1) after finish machining and heat treatment is less than 1.5 microns.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114157092A (en) * | 2021-10-29 | 2022-03-08 | 安徽同盛环件有限公司 | Self-rotating power-driven wind power ring and rotating method thereof |
| CN114171998A (en) * | 2021-11-15 | 2022-03-11 | 安徽同盛环件有限公司 | Self-cleaning structure in wind power ring piece and implementation method thereof |
| CN114198268A (en) * | 2021-11-22 | 2022-03-18 | 安徽同盛环件有限公司 | Wind power ring piece capable of preventing fine sand from invading and implementation method thereof |
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| JP2005240785A (en) * | 2004-02-27 | 2005-09-08 | Mitsubishi Heavy Ind Ltd | Design method of floating body type wind power generator and program for designing floating body type wind power generator |
| CN202001221U (en) * | 2010-12-30 | 2011-10-05 | 保定天威集团有限公司 | Connecting structure of main shaft and gearbox of wind generating set |
| CN106122293A (en) * | 2016-08-25 | 2016-11-16 | 太原重工股份有限公司 | Wind-power locking disc, wind power equipment and the method being used for reducing wind-power locking disc stress |
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Application publication date: 20201218 |