CN110081150B - Wind power gear box and planet wheel bearing lubrication fixing structure thereof - Google Patents
Wind power gear box and planet wheel bearing lubrication fixing structure thereof Download PDFInfo
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- CN110081150B CN110081150B CN201910396193.XA CN201910396193A CN110081150B CN 110081150 B CN110081150 B CN 110081150B CN 201910396193 A CN201910396193 A CN 201910396193A CN 110081150 B CN110081150 B CN 110081150B
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- 238000005461 lubrication Methods 0.000 title claims abstract description 58
- 239000003921 oil Substances 0.000 claims abstract description 166
- 239000010687 lubricating oil Substances 0.000 claims abstract description 82
- 239000002199 base oil Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
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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
- F03D15/00—Transmission of mechanical power
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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
- F03D80/70—Bearing or lubricating arrangements
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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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in 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
- F16H57/04—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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- 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
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0479—Gears or bearings on planet carriers
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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
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0482—Gearings with gears having orbital motion
-
- 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
- F16H57/08—General details of gearing of gearings with members having orbital motion
-
- 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
- F16H2057/02039—Gearboxes for particular applications
- F16H2057/02078—Gearboxes for particular applications for wind turbines
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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
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H2057/085—Bearings for orbital gears
-
- 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)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses a wind power gear box and a planet wheel bearing lubrication fixing structure thereof, wherein the wind power gear box comprises: a planet wheel bearing lubrication fixing structure; the planet wheel bearing lubrication fixing structure comprises: the planetary gear comprises a planet carrier, a pin shaft, a planet gear, a sliding bearing, a stop screw and a spring; the sliding bearing is provided with a lubricating oil bag and an oil inlet hole; one end of the stop screw penetrates through the spring and is in threaded connection with the pin shaft; the other end of the stop screw is inserted into the oil inlet hole; the stop screw is provided with a middle through hole; an oil storage cavity for storing lubricating oil is arranged between one end of the pin shaft and the planet carrier; the axial lubricating oil duct is communicated to the oil storage cavity; the pin shaft is provided with an inclined oil duct; the inclined oil duct is inclined to the axis of the pin shaft. The wind power gear box and the planetary gear bearing lubrication fixing structure have the advantages that the installation reliability of the sliding bearing is high, and the lubrication effect is good.
Description
Technical Field
The invention relates to a wind power gear box and a planet wheel bearing lubrication fixing structure thereof.
Background
In wind driven generators, a gear box is a key component of the wind driven generator, at present, the gear box of the wind driven generator generally comprises one-stage or multi-stage planetary gear shifting stages, and a planetary wheel bearing is generally supported by adopting a rolling bearing. With the increase of single machine power, the gearbox is required to have higher power density and higher reliability, and meanwhile, the cost is required to be strictly controlled, and more failure cases are fed back by the wind power after-market. In particular in planetary gear stages, the failure rate of the planetary rolling bearings increases year by year due to low rotational speeds, high loads and poor operational stability. Based on this, some wind power gearbox manufacturers have begun to investigate the use of plain bearings instead of rolling bearings in wind power gearboxes to meet the above-mentioned use.
Especially for the planetary gear speed change stage of the input stage, as the blades of the wind driven generator are continuously increased and lengthened, the speed of the planetary gear is lower and lower, the load is larger and higher, and the application of the sliding bearing is challenged due to extreme installation and braking working conditions.
The application of the planet wheel sliding bearing has the problems of the temperature exceeding temperature of the sliding bearing and the typical failure of the bearing running ring and the baking pad, and brings barriers to the application of the sliding bearing. Based on this, it is necessary to optimize the existing slide bearing fixing and lubricating structure. The planet sliding bearing is usually fixed by being tightly matched to the pin shaft, an external screw or pin is added, or the planet sliding bearing is simply tightly matched; the lubricating oil duct is usually used for feeding oil from the pin shaft to the sliding bearing and leading out lubricating oil from two end faces of the planet wheel. Under the conditions of low speed and large load, the oil film of the sliding bearing is smaller, and meanwhile, the phenomena of fluid friction, boundary friction and dry friction exist, and the additional external screw and pin have the risk of loosening, so that the sliding bearing is effective; the sliding bearing lubricating oil can only flow out from the end face of the planet wheel, and part of high-temperature lubricating oil cannot be taken away in time, so that the temperature of the sliding bearing is updated too fast.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a wind power gear box and a planet wheel bearing lubrication fixing structure thereof, which improve the reliability of a fixing installation structure and improve the heat dissipation performance.
In order to achieve the above object, the present invention adopts the following scheme:
a planetary gear bearing lubrication fixing structure, comprising: the planet carrier, the pin shaft, the planet wheel and the sliding bearing; the pin shaft is mounted to the planet carrier; the sliding bearing is mounted to the pin shaft; the planet wheel is provided with a pin shaft mounting hole; the pin shaft and the sliding bearing are positioned in the pin shaft mounting hole; the planet wheel is mounted to the planet carrier through a pin shaft; planet wheel bearing lubrication fixing structure still includes: a stop screw for locking the position of the sliding bearing relative to the pin shaft and a spring for applying a pre-tightening force to the stop screw; an oil film gap is formed between the sliding bearing and the pin shaft mounting hole; the sliding bearing is provided with a lubricating oil bag for supplying oil to the oil film gap and an oil inlet hole for supplying oil into the lubricating oil bag; the pin shaft is provided with a radial lubricating oil duct for supplying oil to the oil inlet hole and an axial lubricating oil duct for guiding the oil into the radial lubricating oil duct; the radial lubricating oil duct is communicated with the axial lubricating oil duct; the pin shaft is provided with a spring mounting groove; the spring mounting groove is arranged at one end of the radial lubricating oil duct; the spring is positioned in the spring mounting groove; one end of the stop screw penetrates through the spring and is in threaded connection with the pin shaft; the other end of the stop screw is inserted into the oil inlet hole; the stop screw is provided with a middle through hole for guiding oil in the radial lubricating oil duct into the lubricating oil bag; the middle through hole is communicated with the lubricating oil bag and the radial lubricating oil duct; an oil storage cavity for storing lubricating oil is arranged between one end of the pin shaft and the planet carrier; the axial lubricating oil duct is communicated to the oil storage cavity; the pin shaft is provided with an inclined oil duct for returning oil in the oil storage cavity to the axial lubricating oil duct; the inclined oil duct is inclined to the axis of the pin shaft; the inclined oil duct is communicated with the axial lubricating oil duct and the oil storage cavity.
Further, the sliding bearing is provided with a plurality of lubricating oil pockets arranged 180 degrees in pairs.
Further, the planet wheel bearing lubrication fixing structure further includes: a distance ring; the planet wheel bearing lubrication fixing structure comprises two sliding bearings; the distance ring is arranged between the two sliding bearings.
Further, the outer diameter of the distance ring is smaller than the outer diameter of the sliding bearing.
Further, a difference between an outer diameter of the sliding bearing and an outer diameter of the distance ring is 2mm or more and 3mm or less.
Further, the pin shaft is formed with an oil return channel; the distance ring is provided with oil passing holes for communicating the inner side and the outer side of the distance ring; the oil return channel is communicated with an oil film gap through the oil passing hole.
Further, the inner wall of the distance ring is provided with a ring groove; the annular groove is arranged at one end of the oil passing hole; the distance ring is formed with a plurality of oil holes.
Further, the set screw includes: an upper end portion, a middle section portion, and a lower end portion; the middle section part is communicated with the upper end part and the lower end part; the diameter of the middle section part is larger than that of the upper end part and the lower end part; the spring is sleeved on the periphery of the upper end part; the lower end is inserted into the oil inlet hole.
Further, the spring is disposed between the middle section and the bottom of the spring mounting groove.
Further, the length of the lower end portion is smaller than the depth of the oil inlet hole. The sliding bearing is a radial sliding bearing.
A wind power gearbox comprising: the planet wheel bearing lubrication fixing structure.
The invention has the advantage that the arrangement of the lubricating oil bag ensures that the bearing area of the gearbox can still obtain sufficient lubricating oil supply when the gearbox is operated in the forward direction even in the short-time reverse direction. Because the inclined oil duct with a certain included angle is communicated with the oil storage cavity at the far end of the pin shaft and the axial lubricating oil duct, each sliding bearing can still obtain enough lubricating oil for forming a lubricating oil film when the gear box is started under the pressure oil supply and is powered off; because the distance ring arranged between the two sliding bearings is provided with the oil passing holes, and the corresponding oil return channels are arranged on the pin shafts, the heat generated by friction of the sliding bearings can be timely and rapidly taken away by lubricating oil.
The cooperation of the stop screw and the spring ensures that even in the running process, the vibration screw loosens, and the spring applies pretightening force to the stop screw so that one end of the stop screw can be always embedded into the oil inlet hole of the sliding bearing for effective fixation. One end of the stop screw is limited in a plane lower than the outer surface of the sliding bearing, so that the sliding bearing is effectively fixed and has no influence on an oil film.
Drawings
FIG. 1 is a cross-sectional view of a planet bearing lubrication fixture of the present invention;
fig. 2 is a cross-sectional view of the planet bearing lubrication fixture of fig. 1 in another position.
The planet wheel bearing lubrication fixing structure 100, a planet carrier 10, a planet carrier oil duct 11, a pin shaft 20, a spring mounting groove 21, a radial lubrication oil duct 22, an axial lubrication oil duct 23, an inclined oil duct 24, an oil return passage 25, a pin shaft oil inlet duct 26, a planet wheel 30, a pin shaft mounting hole 31, a sliding bearing 40, a lubrication oil bag 41, an oil inlet hole 42, a stop screw 50, a spring 60, a distance ring 70, an oil passing hole 71, an oil film gap 101, an oil storage cavity 102 and a gear box oil sump 103.
Detailed Description
The invention is described in detail below with reference to the drawings and the specific embodiments.
As shown in fig. 1 and 2, a planetary gear bearing lubrication fixing structure 100 includes: the planetary gear set comprises a planet carrier 10, a pin shaft 20, a planet gear 30, a sliding bearing 40, a stop screw 50 and a spring 60.
The pin 20 is mounted to the planet carrier 10. A sliding bearing 40 is mounted to the pin 20. Specifically, the slide bearing 40 is fitted to the pin shaft 20. Further, the sliding bearing 40 is interference-connected to the pin 20. The slide bearing 40 is a radial slide bearing.
The planet wheel 30 is formed with a pin mounting hole 31. The pin 20 passes through the pin mounting hole 31. The pin 20 and the sliding bearing 40 are located in the pin mounting hole 31. The planet wheels 30 are mounted to the planet carrier 10 by means of pins 20.
The planet bearing lubrication fixing structure 100 can be applied to a wind power gear box. Alternatively, a wind power gearbox includes a planet bearing lubrication fixture 100.
As a specific embodiment, a plurality of planet gears 30 and a plurality of pins 20 may be mounted on the planet carrier 10. Two slide bearings 40 are mounted on each pin.
The set screw 50 is used to lock the position of the slide bearing 40 relative to the pin 20. The spring 60 applies a preload to the set screw 50, which allows the set screw 50 to still effectively lock the relative positions of the slide bearing 40 and the pin 20 when the threads are loosened.
An oil film gap 101 is formed between the slide bearing 40 and the pin mounting hole 31. The sliding bearing 40 is provided with a lubricating oil bag 41 for supplying oil to the oil film gap 101 and an oil inlet hole 42 for supplying oil into the lubricating oil bag 41.
During operation of the planetary transmission, a lubricating oil film is formed in the oil film gap 101. A lubricating oil film is formed between the outer peripheral surface of the sliding bearing 40 and the wall of the pin mounting hole 31.
The pin shaft 20 is formed with a radial lubrication oil passage 22 that supplies oil to the oil inlet hole 42 and an axial lubrication oil passage 23 that introduces oil to the radial lubrication oil passage 22.
The radial lubrication oil passage 22 communicates with the axial lubrication oil passage 23.
The pin 20 is provided with a pin oil inlet passage 26. The carrier 10 is provided with a carrier oil passage 11. The pin oil inlet passage 26 communicates with the axial lubrication passage 23. The lubricating oil enters the axial lubricating oil passage 23 through the carrier oil passage 11 and then enters the pin oil intake passage 26. The lubricating oil may enter the carrier oil passage 11 through the tank oil passage or the oil pipe for oil supply.
As a specific embodiment, the axial lubrication oil passage 23 is located at the center of the pin 20. The axial lubrication oil passage 23 extends in the axial direction of the axis of the pin 20. The radial lubrication oil passage 22 extends radially along the axis of the pin 20. The plurality of radial lubrication oil passages 22 communicate to an axial lubrication oil passage 23. The axial lubrication oil passage 23 supplies oil to the plurality of radial lubrication oil passages 22 to lubricate the sliding bearing 40.
The pin 20 is provided with a spring mounting groove 21. The spring mounting groove 21 is provided at one end of the radial lubrication oil passage 22. The spring 60 is located within the spring mounting slot 21.
One end of the set screw 50 passes through the spring 60 and is threaded with the pin 20. Specifically, the spring 60 is a threaded spring. The insertion of the set screw 50 through the spring 60 means that the set screw 50 is inserted into the inner hole of the spring 60 or that the spring 60 is sleeved on the outer circumference of the set screw 50.
The other end of the set screw 50 is inserted into the oil inlet hole 42. The set screw 50 is formed with a through-hole that introduces the oil in the radial lubrication oil passage 22 to the lubrication oil pocket 41. The intermediate through hole communicates the lubricating oil bag 41 and the radial lubricating oil passage 22.
The lubricating oil introduced into the radial lubricating oil passage 22 is introduced into the lubricating oil pockets 41 through the through holes in the set screws 50. Specifically, the extending direction of the through-holes is the same as the extending direction of the radial lubricating oil passage 22. More specifically, the hole depth direction of the through hole is parallel to the direction in which the spring 60 applies the urging force to the set screw 50.
An oil storage chamber 102 for storing lubricating oil is provided between one end of the pin shaft 20 and the carrier 10. The axial lubrication oil passage 23 communicates to the oil reservoir 102.
The oil reservoir chamber 102 is provided at one end of the axial lubrication oil passage 23. Specifically, the oil reservoir 102 is provided at the final stage of the axial lubrication oil passage 23.
The pin shaft 20 is formed with an inclined oil passage 24 through which oil in the oil reservoir chamber 102 flows back to the axial lubrication oil passage 23. The inclined oil passage 24 is inclined to the axis of the pin 20. The bottom of the oil reservoir chamber 102 communicates to the diagonal oil passage 24. The inclined oil passage 24 forms an angle with the axis of the pin shaft 20. The inclined oil passage 24 communicates with the axial lubrication oil passage 23 and the oil reservoir 102.
After the external oil supply is cut off, the lubricating oil in the oil reservoir chamber 102 can quickly supply the lubricating oil bag 41 through the axial lubricating oil passage 23 and the inclined oil passage 24.
As a preferred embodiment, the sliding bearing 40 is provided with a plurality of lubricating oil pockets 41 arranged in 180-degree pairs. The number of lubricating oil pockets 41 is the same as the number of radial lubricating oil passages 22. The number of lubricating oil pockets 41 is the same as the number of set screws 50. The oil inlet hole 42 is provided in the middle of the lubricating oil bag 41. The set screw 50 and the spring 60 are installed in a kit.
As a specific embodiment, the planetary bearing lubrication fixing structure 100 further includes: distance ring 70.
The pin 20 is sleeved with two sliding bearings 40. The distance ring 70 is arranged between the two slide bearings 40. The pin 20 is provided with a locating shoulder. The slide bearing 40 is axially positioned by means of a positioning shoulder and a distance ring 70. The stop screw 50 cooperates with the oil inlet hole 42 to achieve circumferential positioning.
The distance ring 70 has an outer diameter smaller than the outer diameter of the slide bearing 40. Specifically, the difference between the outer diameter of the slide bearing 40 and the outer diameter of the distance ring 70 is 2mm or more and 3mm or less.
An oil collecting space is formed between the outer surface of the distance ring 70 and the wall of the pin mounting hole 31. Part of the lubricating oil which lubricates the two sliding bearings 40 or part of the lubricating oil in the two oil film gaps 101 gathers in the oil collecting space toward the middle. The pin shaft 20 is formed with an oil return passage 25. The distance ring 70 is formed with oil passing holes 71 communicating the inside and the outside of the distance ring 70. The oil return passage 25 communicates with the oil film gap 101 through the oil passing hole 71. The oil return passage 25 communicates with the gear case oil pool 103. The oil in the oil collecting space enters the oil return passage 25 through the oil passing hole 71 and finally flows back to the gear case oil pool 103. The inner wall of the distance ring 70 is formed with a ring groove. The ring groove is provided at one end of the oil passing hole 71. The distance ring 70 is formed with a plurality of oil passing holes 71. The plurality of oil passing holes 71 are circumferentially uniformly distributed.
An oil passing gap is formed between the end face of the planet wheel 30 and the planet carrier 10. Part of the lubricating oil that lubricates the sliding bearing 40, or part of the lubricating oil in the oil film gap 101, flows back to the gear box oil sump 103 through the oil passing gap.
As a specific embodiment, the stop screw 50 is a stepped screw, which is thin at both ends and thick at the middle. The set screw 50 includes: an upper end portion, a middle section portion and a lower end portion.
The middle section communicates the upper end and the lower end. The diameter of the middle section is larger than the diameters of the upper end and the lower end. The spring 60 is fitted around the outer periphery of the upper end portion. The diameter of the upper end is smaller than the inner diameter of the spring 60. Specifically, the spring 60 is a cylindrical coil spring. The lower end portion is inserted into the oil inlet hole 42. The diameter of the lower end portion is smaller than the diameter of the oil inlet hole 42. Specifically, the middle through hole penetrates the upper end portion, the middle section portion, and the lower end portion.
As a specific embodiment, a threaded structure may be provided in the middle section to form a threaded connection with the pin 20. As an alternative embodiment, a threaded structure may be provided at the upper end to form a threaded connection with the pin 20.
The spring 60 is disposed between the middle stage portion and the bottom of the spring mounting groove 21. The length of the lower end portion is smaller than the depth of the oil inlet hole 42.
In practice, the spring 60 and the set screw 50 are previously installed into the spring installation groove 21 of the pin 20. The set screw 50 is rotated such that the set screw 50 is lower than the outer surface of the pin 20, and then the slide bearing 40 and the distance ring 70 are mounted, respectively. The oil inlet hole 42 on the sliding bearing 40 is aligned with the stop screw 50, the stop screw 50 is reversely rotated to be screwed out a certain distance, so that the stop screw 50 is inserted into the oil inlet hole 42, the middle section part of the stop screw 50 is attached to the inner wall surface of the sliding bearing 40 to form a circumference rotation preventing mechanism and an oil supply structure, and the stop screw 50 can be prevented from being higher than the outer wall surface of the sliding bearing 40 under any working condition, so that the fixing and lubrication failure can be avoided.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the invention in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the invention.
Claims (10)
1. A planetary gear bearing lubrication fixing structure, comprising: the planet carrier, the pin shaft, the planet wheel and the sliding bearing; the pin shaft is mounted to the planet carrier; the sliding bearing is mounted to the pin shaft; the planet wheel is provided with a pin shaft mounting hole; the pin shaft and the sliding bearing are positioned in the pin shaft mounting hole; the planet wheel is mounted to the planet carrier through the pin shaft; it is characterized in that the method comprises the steps of,
the planet wheel bearing lubrication fixing structure further comprises: a stop screw for locking the position of the sliding bearing relative to the pin shaft and a spring for applying a pre-tightening force to the stop screw; an oil film gap is formed between the sliding bearing and the pin shaft mounting hole; the sliding bearing is provided with a lubricating oil bag for supplying oil to the oil film gap and an oil inlet hole for supplying oil into the lubricating oil bag; the pin shaft is provided with a radial lubricating oil duct for supplying oil to the oil inlet hole and an axial lubricating oil duct for guiding the oil into the radial lubricating oil duct; the radial lubricating oil duct is communicated with the axial lubricating oil duct; the pin shaft is provided with a spring mounting groove; the spring mounting groove is arranged at one end of the radial lubricating oil duct; the spring is positioned in the spring mounting groove; one end of the stop screw penetrates through the spring and is in threaded connection with the pin shaft; the other end of the stop screw is inserted into the oil inlet hole; the stop screw is provided with a middle through hole for guiding the oil in the radial lubricating oil duct to the lubricating oil bag; the middle through hole is communicated with the lubricating oil bag and the radial lubricating oil duct; an oil storage cavity for storing lubricating oil is arranged between one end of the pin shaft and the planet carrier; the axial lubricating oil duct is communicated to the oil storage cavity; the pin shaft is provided with an inclined oil duct for enabling oil in the oil storage cavity to flow back to the axial lubricating oil duct; the inclined oil duct is inclined to the axis of the pin shaft; the inclined oil duct is communicated with the axial lubricating oil duct and the oil storage cavity;
the pin shaft is provided with a pin shaft oil inlet passage; the planet carrier is provided with a planet carrier oil duct; the pin shaft oil inlet passage is communicated with the axial lubricating oil passage; the lubricating oil enters the axial lubricating oil duct after entering the pin oil inlet duct through the planet carrier oil duct;
the lubricating oil entering the radial lubricating oil duct is led into the lubricating oil bag through the middle through hole of the stop screw; the hole depth direction of the middle through hole is parallel to the direction of the acting force exerted by the spring on the stop screw;
the number of the lubricating oil bags is the same as the number of the radial lubricating oil channels; the number of the lubricating oil pockets is the same as the number of the stop screws.
2. The planet bearing lubrication fixing structure according to claim 1, wherein,
the sliding bearing is provided with a plurality of lubricating oil bags which are arranged in pairs at 180 degrees.
3. The planet bearing lubrication fixing structure according to claim 1, wherein,
the planet wheel bearing lubrication fixing structure further comprises: a distance ring; the planet wheel bearing lubrication fixing structure comprises two sliding bearings; the distance ring is arranged between the two sliding bearings.
4. The planet-bearing lubrication fixing structure according to claim 3, wherein,
the outer diameter of the distance ring is smaller than the outer diameter of the sliding bearing.
5. The planet-bearing lubrication-fixing structure according to claim 4, wherein,
the difference between the outer diameter of the sliding bearing and the outer diameter of the distance ring is more than or equal to 2mm and less than or equal to 3mm.
6. The planet-bearing lubrication fixing structure according to claim 3, wherein,
the pin shaft is provided with an oil return channel; the distance ring is provided with an oil passing hole which is communicated with the inner side and the outer side of the distance ring; and the oil return channel is communicated with the oil film gap through the oil passing hole.
7. The planet bearing lubrication fixing structure according to claim 6, wherein,
the inner wall of the distance ring is provided with a ring groove; the annular groove is arranged at one end of the oil passing hole; the distance ring is provided with a plurality of oil holes.
8. The planet bearing lubrication fixing structure according to claim 1, wherein,
the set screw includes: an upper end portion, a middle section portion, and a lower end portion; the middle section part is communicated with the upper end part and the lower end part; the diameter of the middle section part is larger than that of the upper end part and the lower end part; the spring is sleeved on the periphery of the upper end part; the lower end portion is inserted into the oil inlet hole.
9. The planet bearing lubrication fixing structure according to claim 8, wherein,
the spring is arranged between the middle section part and the bottom of the spring mounting groove.
10. A wind power gearbox, comprising: the planet bearing lubrication fixing structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN111648920B (en) * | 2020-06-23 | 2022-03-04 | 湘电风能有限公司 | Ultra-compact medium-speed permanent magnet wind generating set |
| CN114877033B (en) * | 2022-06-07 | 2023-09-15 | 南高齿(淮安)高速齿轮制造有限公司 | Transmission mechanism |
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| CN110081150A (en) | 2019-08-02 |
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Effective date of registration: 20190924 Address after: 211103 Jiangning Science Park, Nanjing, Jiangsu, 1 Tianyuan East Road. Applicant after: NANJING HIGH SPEED GEAR MANUFACTURING Co.,Ltd. Applicant after: Nanjing High Precision Transmission Equipment Manufacturing Group Co.,Ltd. Address before: 211103 Jiangning Science Park, Nanjing, Jiangsu, 1 Tianyuan East Road. Applicant before: NANJING HIGH SPEED GEAR MANUFACTURING Co.,Ltd. |
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Effective date of registration: 20200511 Address after: 211103 No.30, Houjiao Road, gaoxinyuan, Jiangning District, Nanjing City, Jiangsu Province Applicant after: NANJING HIGH SPEED GEAR MANUFACTURING Co.,Ltd. Address before: 211103 Jiangning Science Park, Nanjing, Jiangsu, 1 Tianyuan East Road. Applicant before: NANJING HIGH SPEED GEAR MANUFACTURING Co.,Ltd. Applicant before: Nanjing High Precision Transmission Equipment Manufacturing Group Co.,Ltd. |
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