CN115467937A - Gear box for wind power generation and working method thereof - Google Patents
Gear box for wind power generation and working method thereof Download PDFInfo
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- CN115467937A CN115467937A CN202211343454.XA CN202211343454A CN115467937A CN 115467937 A CN115467937 A CN 115467937A CN 202211343454 A CN202211343454 A CN 202211343454A CN 115467937 A CN115467937 A CN 115467937A
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- 238000010248 power generation Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000003921 oil Substances 0.000 claims abstract description 201
- 230000007246 mechanism Effects 0.000 claims abstract description 151
- 239000010687 lubricating oil Substances 0.000 claims abstract description 107
- 230000014759 maintenance of location Effects 0.000 claims abstract description 85
- 238000012546 transfer Methods 0.000 claims abstract description 82
- 238000004321 preservation Methods 0.000 claims abstract description 36
- 238000003756 stirring Methods 0.000 claims description 16
- 230000009471 action Effects 0.000 claims description 12
- 238000000429 assembly Methods 0.000 claims description 11
- 230000000712 assembly Effects 0.000 claims description 11
- 230000000717 retained effect Effects 0.000 claims description 6
- 230000003116 impacting effect Effects 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 abstract description 22
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 12
- 229910021529 ammonia Inorganic materials 0.000 description 6
- 238000013019 agitation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
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- 238000006243 chemical reaction Methods 0.000 description 2
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- 238000005859 coupling reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
- F16H1/22—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0413—Controlled cooling or heating of lubricant; Temperature control therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention belongs to the technical field of gear boxes, and particularly relates to a gear box for wind power generation and a working method thereof, wherein the gear box for wind power generation comprises the following components: the device comprises a box body, an input shaft, a gear mechanism, an output shaft, a detention mechanism and a heat transfer mechanism; when the temperature outside the box body is reduced, the retention mechanism retains part of the lubricating oil on the top of the oil cavity to form a heat-preservation oil layer to prevent the heat loss in the oil cavity; the heat transfer mechanism releases heat into the oil cavity when the temperature outside the box body is reduced, so that the heat-insulating oil layer is dissolved and converged into flowing lubricating oil; the heat transfer mechanism absorbs heat from the oil cavity when the temperature in the box body rises; according to the invention, the heat preservation oil layer is formed on the top of the oil cavity when the temperature is reduced by arranging the retention mechanism, so that the loss of heat in the oil cavity is reduced, the heat is released into the oil cavity at low temperature, the heat can be absorbed from the oil cavity by the heat transfer mechanism for heat dissipation at high temperature, and the alternating load on the box body can be absorbed by the heat transfer mechanism.
Description
Technical Field
The invention belongs to the technical field of gear boxes, and particularly relates to a gear box for wind power generation and a working method thereof.
Background
On the one hand, wind turbine generator system, gear box all are in season in turn, in the great operational environment of the difference in temperature round the clock, and the difference in temperature can influence gear box normal operating, and the viscosity of lubricating oil reduces along with the temperature rise in the gear box, and when lubricating oil temperature was crossed lowly simultaneously, the lubricating oil of gear box will become thick, solidify even, can not realize the abundant lubrication to gear mechanism, and this will make gear mechanism appear damage such as veneer, pitting under lubricated not enough condition. Meanwhile, the metal material is easy to crack because the mechanical property of the metal material is changed at low temperature and becomes brittle; if the external temperature is too high, the temperature of the oil will be further increased by the generated heat during the operation of the gear box, which will reduce the viscosity of the lubricating oil, and the relative thickness of the oil film will be thin, so that the oil can easily penetrate into the cracks on the surface of the gear, and the cracks of the gear will be accelerated to break, and at the same time, the metal micro-particles on the surface of the gear will peel off, and become pitting failure. If the heat generated by the operation of the gearbox is continuously increased, the temperature of the surface of the gear in the gearbox is continuously increased, and when the temperature reaches a certain degree, the oil film on the surface of the gear is expanded and is connected with other parts of the gearbox in a metal mode, and the gluing failure of the tooth surface is caused.
On the other hand, the site selection of the wind power plant is generally located in a region with rich wind resources such as a rare-people grassland, a barren mountain or a next-door desert, the wind power generating set is in a severe working environment throughout the year and is influenced by adverse factors such as strong wind, sand dust, salt fog, humidity, high temperature, severe cold and the like, and the load of the gear box is changed when the wind power generating set is in a complex alternating-load working state all the time no matter the size and the direction of the wind field airflow are changed all the time. The consequent alternating stresses can cause fatigue in the gearbox and gear mechanism, and in severe cases, microscopic cracks. If the gear box continues to operate, the speed of crack generation will increase continuously, and finally the damages such as peeling, pitting, pits, pockmarks and the like will occur, and meanwhile, the alternating load sometimes can even cause weak vibration of the gear box, which will cause the phenomena of mutual friction, impact, extrusion between the contact surfaces of the gear and the bearing, surface scratching, seizure and the like. When the load exceeds the stress range, the phenomenon that the gear is broken due to overload can occur.
Therefore, it is necessary to develop a new gearbox for wind power generation and a working method thereof to solve the above problems.
Disclosure of Invention
The invention aims to provide a gearbox for wind power generation and a working method thereof.
In order to solve the above technical problem, the present invention provides a gear box for wind power generation, comprising: the device comprises a box body, an input shaft, a gear mechanism, an output shaft, a detention mechanism and a heat transfer mechanism; an oil cavity is formed in the box body and used for containing lubricating oil; the gear mechanism is movably arranged in the oil cavity, and the retention mechanism is fixed at the top of the oil cavity; the heat transfer mechanism is arranged at the top of the box body and is positioned above the detention mechanism; the input shaft penetrates into the oil cavity and is movably connected with the gear mechanism, and the output shaft penetrates out of the oil cavity and is movably connected with the gear mechanism; the input shaft drives the gear mechanism and the output shaft to rotate so as to stir the lubricating oil in the oil cavity; when the temperature outside the box body is reduced, the retention mechanism retains part of lubricating oil on the top of the oil cavity to form a heat preservation oil layer to prevent heat loss in the oil cavity; the heat transfer mechanism releases heat into the oil cavity when the temperature outside the box body is reduced, so that the heat-preservation oil is layered and converged into flowing lubricating oil; and the heat transfer mechanism absorbs heat from the oil cavity when the temperature in the box body rises.
Furthermore, the input shaft and the output shaft are connected with the box body in a rolling way through corresponding bearings and sealing rings.
Further, the gear mechanism includes: a plurality of gear sets; each gear set comprises two gears which are in meshed connection; the adjacent gear sets are connected through corresponding connecting shafts, and the connecting shafts are movably arranged on the supporting frame through corresponding bearings; when the number of the gear sets is odd, the rotation directions of the input shaft and the output shaft are opposite; when the number of the gear sets is even, the rotation directions of the input shaft and the output shaft are the same.
Further, the retention mechanism includes: a plurality of retention assemblies; each retention assembly is arranged at the top of the oil cavity in parallel at intervals; when the temperature outside the box body is at a normal temperature threshold value, the gear mechanism stirs lubricating oil in the oil cavity, and the retention assemblies guide the lubricating oil guided to the top of the oil cavity to flow towards the gear mechanism; when the temperature outside the box body is lower than a normal temperature threshold value, the thickened lubricating oil is retained at the top of the oil cavity by the retaining assemblies until a heat-preservation oil layer is formed at the top of the oil cavity.
Further, the retention assembly comprises: l-shaped stagnation bars; the top of the L-shaped retention strip is connected with the top of the oil cavity, and a retention groove is formed between the gap part of the L-shaped retention strip and the top of the oil cavity; when the temperature outside the box body is at a normal temperature threshold value, lubricating oil under the stirring of the gear mechanism flows into a retention groove, and the lubricating oil flowing into the retention groove flows towards the gear mechanism along the side end of the L-shaped retention bar; and when the temperature outside the box body is lower than a normal temperature threshold value, the thickened lubricating oil stays in the staying groove and spreads along the top of the oil cavity until a heat-preservation oil layer is formed at the top of the oil cavity.
Further, the heat transfer mechanism includes: a number of heat transfer components; each heat transfer assembly is arranged at the top of the box body and is positioned above the detention mechanism; each heat transfer assembly absorbs alternating load transferred to the box body by the wind turbine generator; each heat transfer assembly releases heat into the oil cavity when the temperature outside the box body drops; each heat transfer assembly absorbs heat from the oil chamber when the temperature in the tank rises.
Further, the heat transfer assembly includes: a fixed column and a hot bar; a circular platform groove is formed in the fixed column, and a circular platform block is arranged at the bottom of the hot rod; the height of the circular platform groove is equal to that of the circular platform block, the diameter of the upper bottom and the diameter of the lower bottom of the circular platform groove are larger than that of the upper bottom and the diameter of the lower bottom of the circular platform block, namely, the circular platform block is movably arranged in the circular platform groove, a gap is formed between the circular platform block and the circular platform groove to form a force unloading groove, and lubricating oil is contained in the force unloading groove; the fixing column absorbs alternating load transmitted to the box body by the wind turbine generator through lubricating oil in the force unloading groove, namely when the box body is kept still under the action of the alternating load of the wind turbine generator, the lubricating oil relatively fixes the circular truncated cone block in the circular truncated cone groove so that the heat rod and the fixing column are relatively fixed; when the box body vibrates under the alternating load action of the wind turbine generator, the lubricating oil blocks the circular platform block from impacting the circular platform block in the circular platform groove; the hot rod releases heat into the oil cavity when the temperature outside the box body drops; the heat rod absorbs heat from the oil cavity when the temperature in the box body rises.
Further, a plurality of longitudinally arranged radiating fins are arranged at the top of the hot rod and used for radiating heat of the hot rod.
Furthermore, the radiating fins in one heat transfer component and the corresponding radiating fins in the adjacent heat transfer component are arranged in a vertically staggered manner; when each hot rod shakes, the radiating fins arranged correspondingly in a staggered mode clean the plate surfaces mutually.
In another aspect, the present invention provides an operating method using the above-mentioned gearbox for wind power generation, including: the gear mechanism and the output shaft are driven to rotate through the input shaft so as to stir lubricating oil in the oil cavity; when the temperature outside the box body is reduced, part of lubricating oil is retained at the top of the oil cavity through a retention mechanism so as to form a heat-preservation oil layer to prevent heat loss in the oil cavity; the heat transfer mechanism releases heat into the oil cavity when the temperature outside the box body is reduced, so that the heat-insulating oil layer is dissolved and converged into flowing lubricating oil; the heat transfer mechanism absorbs heat from within the oil cavity when the temperature within the tank rises.
The invention has the advantages that the heat preservation oil layer is formed on the top of the oil cavity when the temperature is reduced by arranging the retention mechanism, the loss amount of heat in the oil cavity is reduced, the gear mechanism is fully lubricated at the normal temperature threshold of the residual lubricating oil, and simultaneously the heat transfer mechanism is matched to release heat into the oil cavity when the temperature is low, on one hand, the heat preservation oil layer is dissolved and converged into the lubricating oil, on the other hand, the lubricating oil is heated to the normal temperature threshold to enable the gear mechanism to normally operate, in addition, the heat transfer mechanism can absorb heat from the oil cavity for heat dissipation when the temperature is high, the heat transfer mechanism can also absorb alternating load on the box body, the fatigue phenomenon of the gear box and the gear mechanism is avoided, and the heat transfer mechanism adopts flexible connection to protect the heat transfer mechanism.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a structural view of a gear box for wind power generation of the present invention;
FIG. 2 is a structural view of the gear mechanism of the present invention;
FIG. 3 is a structural view of a retention mechanism of the present invention;
FIG. 4 is a block diagram of a retention assembly of the present invention;
FIG. 5 is a block diagram of the heat transfer mechanism of the present invention;
FIG. 6 is a block diagram of a heat transfer assembly of the present invention;
fig. 7 is a structural view of a fixing column of the invention;
FIG. 8 is a block diagram of a heat bar of the present invention;
fig. 9 is an assembly view of the fixing post and the heat bar of the present invention.
In the figure:
1. a box body; 11. an oil chamber;
2. an input shaft;
3. a gear mechanism; 31. a gear set;
4. an output shaft;
5. a retention mechanism; 51. a retention assembly; 511. l-shaped stagnation bars; 512. a retention tank;
6. a heat transfer mechanism; 61. a heat transfer assembly; 611. fixing the column; 6111. a circular platform groove; 612. a hot bar; 6121. a round table block; 6112. a force unloading groove; 613. a heat sink;
7. a support frame.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1
In the present embodiment, as shown in fig. 1 to 9, the present embodiment provides a gearbox for wind power generation, comprising: the device comprises a box body 1, an input shaft 2, a gear mechanism 3, an output shaft 4, a detention mechanism 5 and a heat transfer mechanism 6; an oil cavity 11 is formed in the box body 1 and used for containing lubricating oil; the gear mechanism 3 is movably arranged in the oil cavity 11, and the retention mechanism 5 is fixed at the top of the oil cavity 11; the heat transfer mechanism 6 is arranged at the top of the box body 1 and is positioned above the detention mechanism 5; the input shaft 2 penetrates into the oil cavity 11 and is movably connected with the gear mechanism 3, and the output shaft 4 penetrates out of the oil cavity 11 and is movably connected with the gear mechanism 3; the input shaft 2 drives the gear mechanism 3 and the output shaft 4 to rotate so as to stir the lubricating oil in the oil cavity 11; when the temperature outside the box body 1 is reduced, the retention mechanism 5 retains part of lubricating oil on the top of the oil cavity 11 to form a heat preservation oil layer to prevent heat loss in the oil cavity 11; the heat transfer mechanism 6 releases heat into the oil cavity 11 when the temperature outside the box body 1 is reduced, so that the heat-preservation oil is layered and converged into flowing lubricating oil; and the heat transfer mechanism 6 absorbs heat from the oil chamber 11 when the temperature in the case 1 rises.
In this embodiment, this embodiment forms the heat preservation oil reservoir at the top of oil pocket 11 when the temperature reduces through setting up detaining mechanism 5, reduce the thermal loss volume in the oil pocket 11, guarantee that remaining lubricating oil department normal temperature threshold fully lubricates gear mechanism 3, cooperate heat transfer mechanism 6 to release the heat in the oil pocket 11 when low temperature simultaneously, on the one hand with the oil reservoir ization of keeping warm and converge in the lubricating oil, on the other hand heats lubricating oil and makes gear mechanism 3 normal operating to normal temperature threshold, and heat transfer mechanism 6 can absorb the heat and dispel the heat in oil pocket 11 when high temperature, heat transfer mechanism 6 can also absorb the alternating load on the box 1, avoid gear box and gear mechanism 3 to appear fatigue phenomenon, heat transfer mechanism 6 adopts the flexible coupling to protect itself.
In this embodiment, the input shaft 2 and the output shaft 4 are both connected with the box 1 in a rolling manner through corresponding bearings and sealing rings.
In the present embodiment, the gear mechanism 3 includes: a plurality of gear sets 31; each gear set 31 comprises two gears in meshed connection; the adjacent gear sets 31 are connected by corresponding connecting shafts which are movably mounted on the support frame 7 by corresponding bearings; when the number of the gear sets 31 is odd, the rotation directions of the input shaft 2 and the output shaft 4 are opposite; when the number of the gear sets 31 is even, the rotation directions of the input shaft 2 and the output shaft 4 are the same.
In the embodiment, the rotation of the gear set 31 in the oil cavity 11 is facilitated by arranging the connecting shaft, the bearing and the supporting frame 7, the friction coefficient is reduced, and the rotation efficiency is improved.
In the present embodiment, the retention mechanism 5 includes: a plurality of retention modules 51; each retention assembly 51 is arranged on the top of the oil cavity 11 in parallel and at intervals; when the temperature outside the box body 1 is at a normal temperature threshold value, the gear mechanism 3 stirs lubricating oil in the oil chamber 11, and each retention assembly 51 guides the lubricating oil flowing to the top of the oil chamber 11 to flow towards the gear mechanism 3; when the temperature outside the box body 1 is lower than the normal temperature threshold value, each retention assembly 51 retains thickened lubricating oil on the top of the oil cavity 11 until a heat-preservation oil layer is formed on the top of the oil cavity 11.
In this embodiment, the top of the oil chamber 11 is filled with the retention component 51, and a supporting force of a heat preservation oil layer can be provided, because when the temperature outside the box body 1 is lower than a normal temperature threshold value, the heat loss direction in the oil chamber 11 gradually spreads from the surface of the box body 1 to the center, and meanwhile, the lubricating oil is thickened or even solidified when the temperature is too low, so that the gear mechanism 3 stirs the lubricating oil in the oil chamber 11 to the retention component 51 and can be hung on the retention component 51, the heat preservation oil layer is formed by the retention component 51 spreading at the top of the oil chamber 11, the heat in the oil chamber 11 is prevented from further losing, and the normal operation of the gear mechanism 3 at a low temperature can be ensured.
In the present embodiment, the retention module 51 includes: an L-shaped retention strip 511; the top of the L-shaped retention strip 511 is connected with the top of the oil chamber 11, and a retention groove 512 is formed between the notch part of the L-shaped retention strip 511 and the top of the oil chamber 11; when the outside temperature of the case 1 is at the normal temperature threshold, the lubricating oil under agitation by the gear mechanism 3 flows into the retention groove 512, and the lubricating oil flowing into the retention groove 512 flows toward the gear mechanism 3 along the side end of the L-shaped retention bar 511; when the temperature outside the tank body 1 is lower than the normal temperature threshold, the thickened lubricating oil stays in the staying groove 512 and spreads along the top of the oil chamber 11 until a heat-preserving oil layer is formed at the top of the oil chamber 11.
In this embodiment, when the temperature outside the housing 1 is at the normal temperature threshold, the lubricating oil keeps relatively thin viscosity, so the lubricating oil under agitation by the gear mechanism 3 is brought to the retention groove 512 and does not stay, but flows toward the gear mechanism 3 under the guidance of the retention groove 512 and the side ends of the L-shaped retention strips 511, so the lubricating effect of the gear mechanism 3 can be improved, and when the temperature outside the housing 1 is lower than the normal temperature threshold, the lubricating oil becomes thick and even solidifies, the lubricating oil under agitation by the gear mechanism 3 is brought to the retention groove 512 and stays and spreads along the L-shaped retention strips 511 at the top of the oil cavity 11, and meanwhile, the L-shaped retention strips 511 are fully distributed at the top of the oil cavity 11, the thickened and even solidified lubricating oil forms a heat preservation oil layer at the top of the oil cavity 11 under the hanging load of the L-shaped retention strips 511, and further heat loss in the oil cavity 11 can be prevented.
In the present embodiment, the heat transfer mechanism 6 includes: a plurality of heat transfer assemblies 61; the heat transfer modules 61 are arranged on the top of the box body 1 and above the detention mechanism 5; each heat transfer assembly 61 absorbs the alternating load transferred to the box body 1 by the wind turbine generator; each heat transfer assembly 61 releases heat into the oil chamber 11 when the temperature outside the box body 1 drops; each of the heat transfer members 61 absorbs heat from the oil chamber 11 when the temperature in the case 1 rises.
In the present embodiment, the heat transfer assembly 61 includes: fixed posts 611 and hot bar 612; a circular truncated cone groove 6111 is formed in the fixing column 611, and a circular truncated cone block 6121 is arranged at the bottom of the hot rod 612; the height of the circular truncated cone groove 6111 higher than the circular truncated cone block 6121 is equal, the diameter of the upper bottom and the diameter of the lower bottom of the circular truncated cone groove 6111 are larger than the diameter of the upper bottom and the diameter of the lower bottom of the circular truncated cone block 6121, namely, the circular truncated cone block 6121 is movably arranged in the circular truncated cone groove 6111, a gap is formed between the circular truncated cone block 6121 and the circular truncated cone groove 6111 to form a force unloading groove 6112, and lubricating oil is contained in the force unloading groove 6112; the fixed column 611 absorbs alternating load transmitted to the box body 1 by the wind turbine generator through the lubricating oil in the force unloading groove 6112, that is, when the box body 1 stands still under the action of the alternating load of the wind turbine generator, the lubricating oil fixes the circular truncated cone block 6121 in the circular truncated cone groove 6111 relatively so that the heat rod 612 and the fixed column 611 are relatively fixed; when the box body 1 vibrates under the alternating load action of the wind turbine generator, the lubricating oil prevents the circular table block 6121 from impacting the circular table block 6121 in the circular table groove 6111; the hot rod 612 releases heat into the oil cavity 11 when the temperature outside the box body 1 is reduced; the heat rod 612 absorbs heat from the oil chamber 11 when the temperature in the case 1 rises.
In this embodiment, the ammonia is stored in the hot stick 612, because round the clock is alternative, when the temperature descends outside the box 1, the ammonia meets cold liquefaction and releases heat, heat lubricating oil in the oil cavity 11, can heat the heat preservation oil reservoir and dissolve open and converge into flowing lubricating oil, and when the temperature ascends in the box 1, the ammonia meets heat vaporization and absorbs heat, can absorb heat from the oil cavity 11, avoid the lubricating oil high temperature to influence the box 1, gear mechanism 3, simultaneously because the reaction of hot stick 612 is comparatively slow, consequently, need set up detention mechanism 5, the top of oil cavity 11 forms the heat preservation oil reservoir now when the temperature is less than the normal temperature threshold outside the box 1, avoid the heat in the oil cavity 11 to run off fast, cooperate with hot stick 612 on the one hand to heat the oil cavity 11 simultaneously, on the other hand dissolve the heat preservation oil reservoir, guarantee this gear box normal operating.
In this embodiment, the thermal rod 612 can ensure that the temperature in the oil chamber 11 is kept within a normal temperature threshold, and timely heat is supplemented when the temperature is lower than the normal temperature threshold, and timely heat is dissipated when the temperature is higher than the normal temperature threshold.
In this embodiment, the fixing column 611 is fixed at the top of the box body 1, the circular truncated cone groove 6111 on the fixing column 611 can penetrate through the fixing column 611 to the top of the box body 1, or does not penetrate through the fixing column 611, the soft connection between the fixing column 611 and the heat rod 612 is realized through the force unloading groove 6112 and the lubricating oil, that is, the soft connection between the heat rod 612 and the box body 1 is realized, and the lubricating oil in the force unloading groove 6112 absorbs the alternating load transmitted to the box body 1 by the wind turbine generator set, so as to protect the box body 1, meanwhile, if the box body 1 is in a stable state, the fixing column 611 is kept stable under the action of the lubricating oil, if the box body 1 vibrates under the action of the alternating load of the wind turbine generator set, the heat rod 612 can be buffered in the force unloading groove 6112 through the lubricating oil, if the heat rod 612 is directly and rigidly connected to the box body 1, the heat rod 612 is very easily broken when the box body 1 vibrates, and the soft connection between the heat rod 612 and the box body 1 can play a role of protecting the heat rod 612.
In this embodiment, a plurality of heat dissipation fins 613 are disposed at the top of the heat rod 612 and are arranged longitudinally, so as to dissipate heat from the heat rod 612.
In the present embodiment, the heat dissipation fins 613 of one heat transfer module 61 are staggered from the corresponding heat dissipation fins 613 of the adjacent heat transfer module 61; when each of the heat bars 612 shakes, the heat dissipation fins 613, which are correspondingly staggered, clean the plate surface mutually.
In this embodiment, the heat rod 612 can dissipate heat through the heat dissipation fins 613, and due to the application environment of the gear box, impurities are easily accumulated on the heat dissipation fins 613, which affects the heat dissipation effect, the heat rod 612 is driven to shake through the vibration of the box body 1, the surfaces of the heat dissipation fins 613 arranged in a staggered manner are cleaned mutually, the function of cleaning the heat dissipation fins 613 is achieved, and the heat dissipation effect is improved.
Example 2
On the basis of embodiment 1, the present embodiment provides an operating method using the gear box for wind power generation as provided in embodiment 1, including: the gear mechanism 3 and the output shaft 4 are driven to rotate through the input shaft 2 so as to stir lubricating oil in the oil cavity 11; when the temperature outside the box body 1 is reduced, part of lubricating oil is retained at the top of the oil cavity 11 through the retention mechanism 5 so as to form a heat-preservation oil layer to prevent heat loss in the oil cavity 11; the heat transfer mechanism 6 releases heat into the oil cavity 11 when the temperature outside the box body 1 is reduced, so that the heat-preservation oil is layered and converged into flowing lubricating oil; the heat transfer mechanism 6 absorbs heat from the oil chamber 11 when the temperature in the case 1 rises.
In this embodiment, this embodiment forms the heat preservation oil reservoir at the top of oil pocket 11 when the temperature reduces through setting up detaining mechanism 5, reduce the thermal loss volume in the oil pocket 11, guarantee that remaining lubricating oil department normal temperature threshold fully lubricates gear mechanism 3, cooperate heat transfer mechanism 6 to release the heat in the oil pocket 11 when low temperature simultaneously, on the one hand with the oil reservoir ization of keeping warm and converge in the lubricating oil, on the other hand heats lubricating oil and makes gear mechanism 3 normal operating to normal temperature threshold, and heat transfer mechanism 6 can absorb the heat and dispel the heat in oil pocket 11 when high temperature, heat transfer mechanism 6 can also absorb the alternating load on the box 1, avoid gear box and gear mechanism 3 to appear fatigue phenomenon, heat transfer mechanism 6 adopts the flexible coupling to protect itself.
In this embodiment, the input shaft 2 and the output shaft 4 are both connected with the box 1 in a rolling manner through corresponding bearings and sealing rings.
In the present embodiment, the gear mechanism 3 includes: a plurality of gear sets 31; each gear set 31 comprises two gears in meshed connection; the adjacent gear sets 31 are connected by corresponding connecting shafts which are movably mounted on the support frame 7 by corresponding bearings; when the number of the gear sets 31 is odd, the rotation directions of the input shaft 2 and the output shaft 4 are opposite; when the number of the gear sets 31 is even, the rotation directions of the input shaft 2 and the output shaft 4 are the same.
In the embodiment, the rotation of the gear set 31 in the oil cavity 11 is facilitated by arranging the connecting shaft, the bearing and the supporting frame 7, the friction coefficient is reduced, and the rotation efficiency is improved.
In the present embodiment, the retention mechanism 5 includes: a plurality of retention modules 51; the detention assemblies 51 are arranged in parallel at intervals at the top of the oil chamber 11; when the temperature outside the box body 1 is at a normal temperature threshold value, the gear mechanism 3 stirs lubricating oil in the oil chamber 11, and each retention assembly 51 guides the lubricating oil flowing to the top of the oil chamber 11 to flow towards the gear mechanism 3; when the temperature outside the box body 1 is lower than a normal temperature threshold value, the thickened lubricating oil is retained at the top of the oil cavity 11 by each retention assembly 51 until a heat-preservation oil layer is formed at the top of the oil cavity 11.
In this embodiment, the top of the oil chamber 11 is filled with the retention component 51, and a supporting force of a heat preservation oil layer can be provided, because when the temperature outside the box body 1 is lower than a normal temperature threshold value, the heat loss direction in the oil chamber 11 gradually spreads from the surface of the box body 1 to the center, and meanwhile, the lubricating oil is thickened or even solidified when the temperature is too low, so that the gear mechanism 3 stirs the lubricating oil in the oil chamber 11 to the retention component 51 and can be hung on the retention component 51, the heat preservation oil layer is formed by the retention component 51 spreading at the top of the oil chamber 11, the heat in the oil chamber 11 is prevented from further losing, and the normal operation of the gear mechanism 3 at a low temperature can be ensured.
In the present embodiment, the retention module 51 includes: an L-shaped retention strip 511; the top of the L-shaped retention strip 511 is connected with the top of the oil chamber 11, and a retention groove 512 is formed between the notch part of the L-shaped retention strip 511 and the top of the oil chamber 11; when the outside temperature of the case 1 is at the normal temperature threshold, the lubricating oil under agitation by the gear mechanism 3 flows into the retention groove 512, and the lubricating oil flowing into the retention groove 512 flows toward the gear mechanism 3 along the side end of the L-shaped retention strip 511; when the temperature outside the tank body 1 is lower than the normal temperature threshold, the thickened lubricating oil stays in the staying groove 512 and spreads along the top of the oil chamber 11 until a heat-preserving oil layer is formed at the top of the oil chamber 11.
In this embodiment, when the external temperature of the housing 1 is at the normal temperature threshold, the lubricating oil keeps relatively thin viscosity, so the lubricating oil under stirring of the gear mechanism 3 is brought to the retention groove 512 and does not stay, but flows towards the gear mechanism 3 under the guidance of the retention groove 512 and the side ends of the L-shaped retention strips 511, which can improve the lubricating effect of the gear mechanism 3, and when the external temperature of the housing 1 is lower than the normal temperature threshold, the lubricating oil becomes thick and even solidifies, the lubricating oil under stirring of the gear mechanism 3 is brought to the retention groove 512 and stays and spreads along the L-shaped retention strips 511 at the top of the oil cavity 11, and meanwhile, the L-shaped retention strips 511 are fully distributed at the top of the oil cavity 11, and the thickened and even solidified lubricating oil forms a heat preservation oil layer at the top of the oil cavity 11 under the hanging load of the L-shaped retention strips 511, which can prevent further heat loss in the oil cavity 11.
In the present embodiment, the heat transfer mechanism 6 includes: a plurality of heat transfer assemblies 61; the heat transfer assemblies 61 are arranged on the top of the box body 1 and positioned above the detention mechanism 5; each heat transfer assembly 61 absorbs the alternating load transferred to the box body 1 by the wind turbine; each heat transfer component 61 releases heat into the oil cavity 11 when the temperature outside the box body 1 is reduced; each of the heat transfer members 61 absorbs heat from the oil chamber 11 when the temperature in the case 1 rises.
In the present embodiment, the heat transfer assembly 61 includes: a fixed post 611 and a hot bar 612; a circular truncated cone groove 6111 is formed in the fixing column 611, and a circular truncated cone block 6121 is arranged at the bottom of the hot rod 612; the height of the circular truncated cone groove 6111 higher than the circular truncated cone block 6121 is equal, the diameter of the upper bottom and the diameter of the lower bottom of the circular truncated cone groove 6111 are larger than the diameter of the upper bottom and the diameter of the lower bottom of the circular truncated cone block 6121, namely, the circular truncated cone block 6121 is movably arranged in the circular truncated cone groove 6111, a gap is formed between the circular truncated cone block 6121 and the circular truncated cone groove 6111 to form a force unloading groove 6112, and lubricating oil is contained in the force unloading groove 6112; the fixing column 611 absorbs alternating load transmitted to the box body 1 by the wind turbine generator through the lubricating oil in the force unloading groove 6112, that is, when the box body 1 stands still under the action of the alternating load of the wind turbine generator, the lubricating oil fixes the circular truncated cone block 6121 in the circular truncated cone groove 6111 relatively so that the heat rod 612 and the fixing column 611 are fixed relatively; when the box body 1 vibrates under the alternating load action of the wind turbine generator, the lubricating oil blocks the circular table block 6121 from impacting the circular table block 6121 in the circular table groove 6111; the hot rod 612 releases heat into the oil cavity 11 when the temperature outside the box body 1 is reduced; the heat rod 612 absorbs heat from the oil chamber 11 when the temperature in the case 1 rises.
In this embodiment, the ammonia is stored in the hot stick 612, because round the clock is alternative, when the temperature descends outside the box 1, the ammonia meets cold liquefaction and releases heat, heat lubricating oil in the oil cavity 11, can heat the heat preservation oil reservoir and dissolve open and converge into flowing lubricating oil, and when the temperature ascends in the box 1, the ammonia meets heat vaporization and absorbs heat, can absorb heat from the oil cavity 11, avoid the lubricating oil high temperature to influence the box 1, gear mechanism 3, simultaneously because the reaction of hot stick 612 is comparatively slow, consequently, need set up detention mechanism 5, the top of oil cavity 11 forms the heat preservation oil reservoir now when the temperature is less than the normal temperature threshold outside the box 1, avoid the heat in the oil cavity 11 to run off fast, cooperate with hot stick 612 on the one hand to heat the oil cavity 11 simultaneously, on the other hand dissolve the heat preservation oil reservoir, guarantee this gear box normal operating.
In this embodiment, the thermal rod 612 can ensure that the temperature in the oil chamber 11 is kept within a normal temperature threshold, and timely heat is supplemented when the temperature is lower than the normal temperature threshold, and timely heat is dissipated when the temperature is higher than the normal temperature threshold.
In this embodiment, the fixing column 611 is fixed at the top of the box body 1, the circular truncated cone groove 6111 on the fixing column 611 can penetrate through the fixing column 611 to the top of the box body 1, or does not penetrate through the fixing column 611, the soft connection between the fixing column 611 and the heat rod 612 is realized through the force unloading groove 6112 and the lubricating oil, that is, the soft connection between the heat rod 612 and the box body 1 is realized, the lubricating oil in the force unloading groove 6112 absorbs the alternating load transmitted to the box body 1 by the wind turbine generator set, so as to protect the box body 1, meanwhile, if the box body 1 is in a stable state, the fixing column 611 is kept stable under the action of the lubricating oil, if the box body 1 vibrates under the action of the alternating load of the wind turbine generator set, the heat rod 612 can also be buffered in the force unloading groove 6112 through the lubricating oil, if the heat rod 612 is directly and rigidly connected to the box body 1, the heat rod 612 is very easily broken when the box body 1 vibrates, and the soft connection between the heat rod 612 and the box body 1 is adopted, so as to protect the heat rod 612.
In this embodiment, a plurality of heat dissipation fins 613 are disposed at the top of the heat rod 612 and are arranged longitudinally, so as to dissipate heat from the heat rod 612.
In this embodiment, the heat dissipation fins 613 of one heat transfer module 61 are staggered with the corresponding heat dissipation fins 613 of the adjacent heat transfer module 61; when each of the heat bars 612 shakes, the heat dissipation fins 613, which are correspondingly staggered, clean the plate surface mutually.
In this embodiment, the heat bar 612 can dissipate heat through the heat dissipation fins 613, and due to the application environment of the gear box, impurities are easily accumulated on the heat dissipation fins 613, so that the heat dissipation effect is affected, the heat bar 612 is driven to shake through the vibration of the gear box body 1, the plates of the heat dissipation fins 613 arranged in a staggered manner are cleaned, the heat dissipation fins 613 are cleaned, and the heat dissipation effect is improved.
In summary, the heat preservation oil layer is formed on the top of the oil cavity when the temperature of the heat transfer mechanism is reduced, so that the loss amount of heat in the oil cavity is reduced, the gear mechanism is fully lubricated at the normal temperature threshold of the residual lubricating oil, and the heat transfer mechanism is matched to release heat into the oil cavity when the temperature is low, so that the heat preservation oil layer is dissolved and converged into the lubricating oil, the lubricating oil is heated to the normal temperature threshold to enable the gear mechanism to normally operate, the heat transfer mechanism can absorb heat from the oil cavity to dissipate heat at high temperature, the heat transfer mechanism can absorb alternating load on the box body, the fatigue phenomenon of the gear box and the gear mechanism is avoided, and the heat transfer mechanism adopts flexible connection to protect the heat transfer mechanism.
The components (components without specific structures) selected for use in the present application are all common standard components or components known to those skilled in the art, and the structures and principles thereof can be known to those skilled in the art through technical manuals or through routine experimental methods.
In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A gearbox for wind power generation, characterized by comprising:
the device comprises a box body, an input shaft, a gear mechanism, an output shaft, a detention mechanism and a heat transfer mechanism; wherein
An oil cavity is formed in the box body and used for containing lubricating oil;
the gear mechanism is movably arranged in the oil cavity, and the retention mechanism is fixed at the top of the oil cavity;
the heat transfer mechanism is arranged at the top of the box body and is positioned above the detention mechanism;
the input shaft penetrates into the oil cavity and is movably connected with the gear mechanism, and the output shaft penetrates out of the oil cavity and is movably connected with the gear mechanism;
the input shaft drives the gear mechanism and the output shaft to rotate so as to stir lubricating oil in the oil cavity;
when the temperature outside the box body is reduced, the retention mechanism retains part of lubricating oil on the top of the oil cavity to form a heat preservation oil layer to prevent heat loss in the oil cavity;
the heat transfer mechanism releases heat into the oil cavity when the temperature outside the box body is reduced, so that the heat-preservation oil is layered and converged into flowing lubricating oil; and
the heat transfer mechanism absorbs heat from the oil chamber when the temperature in the tank body rises.
2. The gearbox for wind power generation according to claim 1,
the input shaft and the output shaft are connected with the box body in a rolling way through corresponding bearings and sealing rings.
3. The gearbox for wind power generation according to claim 1,
the gear mechanism includes: a plurality of gear sets;
each gear set comprises two gears in meshed connection;
adjacent gear sets are connected through corresponding connecting shafts, and the connecting shafts are movably arranged on the supporting frame through corresponding bearings;
when the number of the gear sets is odd, the rotation directions of the input shaft and the output shaft are opposite;
when the number of the gear sets is even, the rotation directions of the input shaft and the output shaft are the same.
4. The gearbox for wind power generation according to claim 1,
the retention mechanism includes: a plurality of retention assemblies;
each detention assembly is arranged at the top of the oil cavity in parallel at intervals;
when the temperature outside the box body is at a normal temperature threshold value, the gear mechanism stirs lubricating oil in the oil cavity, and the retention assemblies guide the lubricating oil guided to the top of the oil cavity to flow towards the gear mechanism;
when the temperature outside the box body is lower than a normal temperature threshold value, the thickened lubricating oil is retained at the top of the oil cavity by the retaining assemblies until a heat-preservation oil layer is formed at the top of the oil cavity.
5. The gearbox for wind power generation according to claim 4,
the retention assembly includes: l-shaped stagnation bars;
the top of the L-shaped retention strip is connected with the top of the oil cavity, and a retention groove is formed between the gap part of the L-shaped retention strip and the top of the oil cavity;
when the temperature outside the box body is at a normal temperature threshold value, lubricating oil under the stirring of the gear mechanism flows into a retention groove, and the lubricating oil flowing into the retention groove flows towards the gear mechanism along the side end of the L-shaped retention bar;
and when the temperature outside the box body is lower than a normal temperature threshold value, the thickened lubricating oil stays in the staying groove and spreads along the top of the oil cavity until a heat-preservation oil layer is formed at the top of the oil cavity.
6. The gearbox for wind power generation according to claim 1,
the heat transfer mechanism includes: a number of heat transfer components;
each heat transfer assembly is arranged at the top of the box body and is positioned above the detention mechanism;
each heat transfer assembly absorbs alternating load transferred to the box body by the wind turbine generator;
each heat transfer assembly releases heat into the oil cavity when the temperature outside the box body drops;
each of the heat transfer assemblies absorbs heat from within the oil cavity as the temperature within the tank rises.
7. The gearbox for wind power generation according to claim 6,
the heat transfer assembly includes: a fixed column and a hot bar;
a circular platform groove is formed in the fixed column, and a circular platform block is arranged at the bottom of the hot rod;
the height of the circular platform groove higher than the circular platform block is equal, and the diameter of the upper bottom and the diameter of the lower bottom of the circular platform groove are larger than the diameter of the upper bottom and the diameter of the lower bottom of the circular platform block, namely
The circular table block is movably arranged in the circular table groove, a gap is formed between the circular table block and the circular table groove to form a force unloading groove, and lubricating oil is contained in the force unloading groove;
the fixed column absorbs alternating load transmitted to the box body by the wind turbine generator through lubricating oil in the force unloading groove, namely
When the box body is kept still under the alternating load action of the wind turbine generator, the lubricating oil relatively fixes the circular truncated cone block in the circular truncated cone groove so that the hot rod and the fixed column are relatively fixed;
when the box body vibrates under the alternating load action of the wind turbine generator, the lubricating oil blocks the circular platform block from impacting the circular platform block in the circular platform groove;
the hot rod releases heat into the oil cavity when the temperature outside the box body is reduced;
the heat bar absorbs heat from the oil cavity when the temperature in the box body rises.
8. The gearbox for wind power generation according to claim 7,
the top of the hot rod is provided with a plurality of radiating fins which are longitudinally arranged and used for radiating heat of the hot rod.
9. The gearbox for wind power generation according to claim 8,
the radiating fins in one heat transfer component and the corresponding radiating fins in the adjacent heat transfer component are arranged in a vertically staggered manner;
when each hot rod shakes, the radiating fins arranged correspondingly in a staggered mode clean the plate surface mutually.
10. A method of operating a gearbox for wind power generation according to any of claims 1-9, comprising:
the gear mechanism and the output shaft are driven to rotate through the input shaft so as to stir lubricating oil in the oil cavity;
when the temperature outside the box body is reduced, part of lubricating oil is retained at the top of the oil cavity through a retention mechanism so as to form a heat-preservation oil layer to prevent heat loss in the oil cavity;
the heat transfer mechanism releases heat into the oil cavity when the temperature outside the box body is reduced, so that the heat-insulating oil layer is dissolved and converged into flowing lubricating oil;
the heat transfer mechanism absorbs heat from the oil chamber when the temperature in the tank rises.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211343454.XA CN115467937A (en) | 2022-10-31 | 2022-10-31 | Gear box for wind power generation and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211343454.XA CN115467937A (en) | 2022-10-31 | 2022-10-31 | Gear box for wind power generation and working method thereof |
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| CN115467937A true CN115467937A (en) | 2022-12-13 |
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| CN202211343454.XA Pending CN115467937A (en) | 2022-10-31 | 2022-10-31 | Gear box for wind power generation and working method thereof |
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| CN102777581A (en) * | 2012-07-31 | 2012-11-14 | 南京风电科技有限公司 | Heating and cooling device of wind turbine generator system |
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| CN113623152A (en) * | 2021-06-15 | 2021-11-09 | 三一重能股份有限公司 | Cooling system of wind driven generator and wind driven generator |
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2022
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| CN102777581A (en) * | 2012-07-31 | 2012-11-14 | 南京风电科技有限公司 | Heating and cooling device of wind turbine generator system |
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