CN220378858U - Planetary gear system with stable operation - Google Patents
Planetary gear system with stable operation Download PDFInfo
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- CN220378858U CN220378858U CN202322039080.9U CN202322039080U CN220378858U CN 220378858 U CN220378858 U CN 220378858U CN 202322039080 U CN202322039080 U CN 202322039080U CN 220378858 U CN220378858 U CN 220378858U
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- 238000005253 cladding Methods 0.000 claims abstract description 49
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 42
- 238000005461 lubrication Methods 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 88
- 238000003860 storage Methods 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 18
- 229910000906 Bronze Inorganic materials 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 14
- 239000010687 lubricating oil Substances 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 6
- 230000003746 surface roughness Effects 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 61
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 12
- 238000004372 laser cladding Methods 0.000 description 11
- 230000009286 beneficial effect Effects 0.000 description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 8
- 239000010974 bronze Substances 0.000 description 6
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000010008 shearing Methods 0.000 description 6
- 238000005266 casting Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 239000000956 alloy Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 3
- 238000012356 Product development Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000009750 centrifugal casting Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- 238000005204 segregation Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of wind driven generators, in particular to a planetary gear system with stable operation, which comprises a planetary carrier, planetary wheels and a planetary central shaft, wherein the planetary central shaft is fixed on the planetary carrier, the planetary central shaft is a transmission shaft, the outer surface of the planetary central shaft is a cladding matrix, the outer surface of the cladding matrix is clad with a copper alloy layer, a first oil duct which extends axially is arranged in the planetary central shaft, a second oil duct which extends towards the planetary central shaft is arranged in the planetary carrier, and the copper alloy layer and the planetary wheels are lubricated in an oil lubrication mode.
Description
Technical Field
The utility model relates to the technical field of wind driven generators, in particular to a planetary gear system with stable operation.
Background
The gearbox in a wind generating set is an important mechanical component, and the main function of the gearbox is to transmit power generated by a wind wheel under the action of wind power to a generator and enable the generator to obtain corresponding rotating speed. Wind power gearboxes are of various types and can be divided into parallel shaft gearboxes, planetary gearboxes and gearboxes (planetary + parallel shaft) combined with each other according to the conventional types, wherein the planetary gearboxes are most widely applied due to the characteristics of stable transmission, large bearing capacity and long service life, a planetary gear mechanism is arranged in each planetary gearbox, the conventional planetary gear mechanism is a mechanism formed by rotating a plurality of planetary gears around a sun gear, planetary gears are generally supported on a planetary carrier through a planetary central shaft, and the planetary gears are in sliding fit with the planetary central shaft through bearings.
The bearing can be divided into a rolling bearing and a sliding bearing, most of the bearings used in planetary gear mechanisms in China currently depend on imported rolling bearings, and the rolling bearings have the advantages of being standardized in size, convenient to select, stable in quality, good in interchangeability and the like, but are high in purchase price, limited in service life, large in size and incapable of continuously meeting the requirements of persistence and light weight of a wind power gear box, sliding friction occurs when the sliding bearing works, the sliding friction force mainly depends on manufacturing precision, and the rolling bearing has the advantages of being simple in structure, small in part size, high in matching precision, good in impact resistance and the like, can be widely applied to heavy industrial mechanical equipment with requirements of high power, high rotating speed, heavy load and the like including the wind power gear box, and particularly plays a role in supporting the work of a transmission shaft.
The inventor designs a lubrication structure of a planet wheel sliding bearing of a wind power gear box (publication number: CN217481930U, mainly designed a set of lubrication structure aiming at a planet gear mechanism adopting the sliding bearing, wherein the lubrication structure comprises an axially extending oil passage arranged in the planet shaft, and an axially extending oil passing hole and an oil storage groove arranged on the outer circumference of the planet shaft, the oil passage is communicated with the oil passing hole and the oil storage groove through the arranged oil passage, and the oil passage is communicated with an oil inlet hole arranged on a planet carrier through a radially extending oil supply hole, so that lubricating oil respectively reaches the axially extending oil passing hole and the oil storage groove through a plurality of oil passing holes from the inner part of the planet shaft, but the following technical problems are found in the subsequent practical application process:
in the prior art, copper castings such as copper sleeves and the like are commonly adopted in the sliding bearing, the processing technology is manufactured by adopting preparation technologies such as centrifugal casting or gravity casting, and the traditional casting technology is relatively mature, but certain limitations still exist, and the specific reasons are that the sliding bearing has the defects of high overall cost, unstable bearing structure, thick and thick bearing structure, component segregation, great influence by human factors and the like, and lubricating oil in a radial gap between the sliding bearing and a planet wheel is easily discharged by being heated in the continuous rotation process, so that the phenomena of dry friction and running ring are easy to occur, a large amount of friction work loss and serious abrasion are further generated, and the sliding bearing product has a certain gap from an overseas mature product in service life, running reliability and the like.
Disclosure of Invention
The utility model provides a planetary gear system with stable operation, which can solve the technical problems that the thickness of a traditional sliding bearing is higher in the prior art, and the planetary gear system is easy to leak oil so that the operation is not reliable enough.
The application provides the following technical scheme:
the utility model provides a stable planetary gear system moves, includes planet carrier, planet wheel, planet center pin, and the planet center pin is fixed on the planet carrier, the planet center pin is the transmission shaft, and the surface of planet center pin is cladding base member, cladding base member's surface cladding has the copper alloy layer, the inside first oil duct that extends of axial that has been arranged of planet center pin, the inside second oil duct that leads to the planet center pin and extends that is provided with of planet carrier, lubricate with the oil lubrication mode between copper alloy layer and the planet wheel.
The beneficial effects are that:
when the traditional copper sleeve is used as the sliding bearing, the limiting thickness of the processing technology can reach 15mm, and the copper alloy layer is clad on the surface of the planetary central shaft, so that the thickness of the copper alloy layer can be greatly reduced, the traditional casting process flow is shortened, the production cost is saved, meanwhile, compared with the traditional copper sleeve which is in partial contact in the rotating process of the planetary central shaft, the copper sleeve is characterized in that the traditional copper sleeve is a matching piece and has thicker thickness, the phenomenon of seizure locking and operation failure is caused when the traditional copper sleeve is in partial contact, the planetary central shaft clad with the copper alloy layer is of an integrated structure, the copper alloy thickness is obviously reduced, the thermal expansion deformation of the copper alloy layer is small when the copper alloy layer is in partial contact, the seizure locking is not easy to occur, the phenomena of dry friction and running ring can be effectively avoided, the stable operation of a planetary gear system is facilitated, and the product development and upgrading of the wind power gearbox sliding bearing are facilitated through the cladding technology.
Further, the copper alloy layer is an aluminum bronze alloy layer, and the powder particle size of the aluminum bronze alloy layer ranges from 50 microns to 150 microns.
The beneficial effects are that:
the inventor respectively makes experimental comparison on tin bronze, lead bronze and aluminum bronze alloy powder based on environmental protection and cost consideration, and discovers that the lead bronze has low cost but does not meet the environmental protection requirement of lead removal; tin bronze has poor formability, is easy to generate air holes and crack defects, and has unstable process and high cost; the aluminum bronze has good formability, stable process and lower cost, and meets the material performance selection of the aluminum bronze.
The molten pool is formed by adding alloy materials into a matrix and performing laser radiation, and the alloy materials and the matrix are solidified together rapidly to form a cladding layer (namely a copper alloy layer), so that when the grain size of the aluminum bronze alloy powder is 50-150 microns, good alloy powder flowability can be ensured, the alloy powder can be continuously conveyed into the molten pool in the laser cladding process, and the copper alloy layer and the planetary central shaft matrix can achieve good metallurgical bonding under the action of a high-heat laser heat source, thereby being beneficial to improving the forming quality of the cladding layer.
Further, the effective thickness of the copper alloy layer is 1.0mm, the surface roughness is not more than 0.4 microns after grinding and finishing treatment, and the height difference of the concave-convex is not more than 0.3 mm.
The beneficial effects are that: the flat copper alloy layer is obtained, so that stability and reliability of the planetary central shaft in the running process are guaranteed, and meanwhile, the planetary central shaft can always keep small working noise in the whole running process.
Further, the base material is 42CrMo4 steel, and the grinding and finishing treatment is carried out until the surface roughness is not more than 0.8 micron.
The beneficial effects are that: is favorable for obtaining a smooth copper alloy layer and reducing friction loss.
Further, a radial gap is formed between the copper alloy layer and the planet central shaft, and the radial gap is 0.8-1.2 per mill of the diameter of the planet central shaft.
The beneficial effects are that: when the sliding bearing is adopted, the inner ring of the bearing is in clearance fit with the planetary central shaft, the clearance is generally 0.01-0.02 mm, but the range of the clearance is determined according to the precision of the used part, the same copper alloy layer is in clearance fit with the planetary central shaft, but the radial clearance is 0.8-1.2 per mill of the diameter of the planetary central shaft, so that a stable oil film can be established after lubricating oil is filled, parts are fully lubricated, and the stable operation of a planetary gear system is ensured.
Further, the first oil duct comprises an axial oil duct arranged in the planet central shaft, and an oil passing hole and an oil storage tank which are communicated with the axial oil duct, and lubricating oil can flow into a radial gap between the copper alloy layer and the planet central shaft through the axial oil duct, the oil passing hole and the oil storage tank in sequence in the planet central shaft.
The beneficial effects are that: lubricating oil flows into a radial gap between the copper alloy layer and the planet central shaft through the first oil duct, so that the oil supply requirement is met.
Further, the second oil duct comprises an axial oil duct arranged in the planet carrier, and an oil passing hole and an oil storage tank which are communicated with the axial oil duct, and lubricating oil can flow into a radial gap between the copper alloy layer and the planet central shaft through the axial oil duct, the oil passing hole and the oil storage tank in sequence in the planet carrier.
The beneficial effects are that: lubricating oil flows into a radial gap between the copper alloy layer and the planet central shaft through the second oil duct, so that the oil supply requirement is met.
Further, the copper alloy layer is in interference fit with the planet gears.
The beneficial effects are that: the oil storage tank is always in a non-stress bearing area, when the area corresponding to the planet central shaft is immersed in the oil pool, the oil storage tank can be filled with oil instantly, and after the area rotates out of the oil pool, the lubricating oil stored in the oil storage tank can be released to the bearing area of the planet central shaft, so that the functional area is lubricated better.
Drawings
FIG. 1 is a schematic diagram of a planetary gear system embodiment of the present utility model in a steady operation configuration;
FIG. 2 is a cross-sectional view of the central axis portion of the planet of FIG. 1;
Detailed Description
The laser cladding technology is to place selected coating materials on the surface of a cladding substrate in different material adding modes, then to make the selected coating materials and the surface of the substrate simultaneously melt together by high-power and high-density laser irradiation, and to form a surface coating with extremely low dilution after rapid solidification and forming metallurgical bonding with the substrate, thereby remarkably improving the wear-resistant, corrosion-resistant, heat-resistant, oxidation-resistant and electrical characteristics of the surface of the substrate, achieving the purpose of surface modification or repair, meeting the requirements on specific properties of the surface of the material, and saving a large number of noble elements.
The following is a further detailed description of the embodiments:
the labels in the drawings of this specification include: the planet wheel 1, the copper alloy layer 2, the planet center shaft 3, the planet carrier 4, the second oil duct 5 and the first oil duct 6.
Example 1
Referring to fig. 1-2, a planetary gear system with stable operation includes a planetary carrier 4, a planetary wheel 1, and a planetary central shaft 3, wherein the planetary central shaft 3 is fixed on the planetary carrier 4, the planetary central shaft 3 is a transmission shaft, the outer surface of the planetary central shaft 3 is a cladding substrate, the outer surface of the cladding substrate is clad with a copper alloy layer 2, a first oil duct 6 extending axially is arranged inside the planetary central shaft 3, a second oil duct 5 extending toward the planetary central shaft 3 is arranged inside the planetary carrier 4, and the copper alloy layer 2 and the planetary wheel 1 are lubricated in an oil lubrication mode.
The first oil passage 6 includes an axial oil passage provided inside the planetary center shaft 3 and an oil passing hole and an oil storage tank communicated with the axial oil passage, and lubricating oil can flow into a radial gap between the copper alloy layer 2 and the planetary center shaft 3 inside the planetary center shaft 3 through the axial oil passage and the oil passing hole and the oil storage tank in order.
The second oil passage 5 includes an axial oil passage provided inside the planet carrier 4 and an oil passing hole and an oil storage tank communicated with the axial oil passage, and lubricating oil can flow into a radial gap between the copper alloy layer 2 and the planet central shaft 3 inside the planet carrier 4 through the axial oil passage, the oil passing hole and the oil storage tank in sequence.
The forming process of the copper alloy layer 2 adopts a laser cladding technology, the laser cladding technology can ensure the thickness and the surface evenness of a cladding layer by controlling the technological parameters of powder feeding amount, 2400W is adopted as the laser power in the embodiment, the original cladding material is aluminum bronze alloy powder, and the grain diameter of the powder is 100 mu m; the effective thickness of the copper alloy layer 2 is larger than 1.0mm, and the surface roughness is not more than 0.4 mu m after grinding and finishing treatment, and the concave-convex height difference is not more than 0.3 mm; the substrate material of the cladding substrate is 42CrMo4 steel, and the grinding and finish machining treatment is carried out until the surface roughness is not more than 0.8 mu m; the copper alloy layer 2 is in interference fit with the planet wheel 1, a radial gap exists between the copper alloy layer 2 and the planet central shaft 3, and the radial gap is 0.8-1.2 per mill of the diameter of the planet central shaft 3.
Example two
The difference between this example and example one is that the cladding powder particle size is 150 μm and the laser cladding power is adjusted to 2800w.
Example III
The difference between this example and example one is that the cladding powder particle size is 50 μm and the laser cladding power is adjusted to 2200w.
Comparative example one
The difference between this embodiment and the first embodiment is that the original cladding material is tin bronze alloy powder.
Comparative example two
The difference between the present embodiment and the first embodiment is that the laser power is adjusted to 3000w.
Comparative example three
The difference between the present embodiment and the first embodiment is that the forming process of the cladding layer uses high-speed laser cladding.
As shown in Table 1, the quality detection qualification index range of the cladding layer formed by machining the outer surface of the planetary central shaft in the wind power gear box in the prior art is embodied:
| quality inspection item | Quality qualification index range |
| Thickness of cladding layer | ≥1.0mm |
| Dilution ratio of cladding layer | ≤15％ |
| Flatness of cladding layer | The height difference of the wave crest and the wave trough is less than or equal to 0.3mm |
| Hardness of cladding layer | 150-250HV |
| Binding force of cladding layer | ≥100N |
| Friction wear test | ≤0.35 |
| Visual inspection and porosity test | No defects of loose, air holes, slag inclusion, cracks and the like can be seen by naked eyes |
TABLE 2
Especially, the processing requirement on the thickness of the cladding layer in the actual production process is generally controlled to be 1.0-1.5mm, in order to save the cost, the cladding layer cannot be too thick beyond 1.5mm after being molded, the performance cannot be too thin below 1.0mm, and the limitation of the processing technology of spraying the lubricating layer on the cladding layer is also considered,
as shown in the following tables 2 and 3, the inventor detects 6-component products respectively, and according to the detection results, the quality detection of the first embodiment, the second embodiment and the third embodiment is qualified, and it is worth mentioning that the scheme of the first embodiment is superior to the scheme of the second embodiment and the third embodiment in the aspects of the surface evenness of the cladding layer, the shearing strength of the cladding interface and the bonding force of the cladding layer, especially in the shearing strength of the cladding interface, the shearing strength of the first embodiment is 622.8Mpa, and compared with the second embodiment, the shearing strength of the first embodiment is improved by 105.2Mpa, compared with the third embodiment, the scheme of the high shearing strength is especially suitable for extreme environments in wind power projects, effectively resists wind impact, and is beneficial to improving the stability and long-term operation of the system.
Compared with the first embodiment, the second embodiment and the third embodiment respectively, firstly, the thickness of the cladding layer is less than 1mm, and secondly, the shearing strength of the cladding interface is only 387.9Mpa, 221.62Mpa and 188.1Mpa, and the cladding interface cannot be well adapted to the extreme environment under the wind power project; the bonding force of the three cladding layers of the comparative example adopting the high-speed laser cladding technology as a molding process is only 62.21N, the single-layer cladding is thinner, the dilution rate is as low as 3.1%, the bonding performance of the cladding layers and the substrate is poor, and even the cladding layers and the substrate cannot be bonded in certain test results.
TABLE 2
TABLE 3 Table 3
In addition, the inventor adopts aluminum bronze alloy powder with different powder particle sizes to carry out experiments, and discovers that under the same laser cladding process, when the powder particle size is more than 150 microns, the resistance of a formed cladding layer is obviously improved under the sliding condition, the operation of a conveying shaft can not be well supported, the energy value required for melting the powder with the same quality is larger, and the production cost is increased; when the particle size of the powder is smaller than 50 microns, the erosion resistance and hardness of the cladding layer are obviously reduced, and the powder cannot be well adapted to the application environment under the wind power project; in addition, when the laser power is adjusted to 3000W or more, the influence on the reduction of the thickness of the cladding layer is irreversible in addition to the increase of the processing cost, and the requirement that the thickness of the cladding layer is greater than 1.0mm cannot be satisfied, whereas when the laser power is adjusted to 2000W or less, the temperature gradient toward the middle part of the cladding layer is reduced along with the transition of the solid-liquid interface in the laser cladding process, and the phenomenon of furrowing, chipping and delamination easily occurs on the surface of the cladding layer, resulting in serious abrasion.
The comprehensive performance of the first embodiment is the most excellent in combination with comprehensive tests on hardness detection, quality detection, binding force and the like, and meanwhile, the requirements on cost and environmental protection are considered, and the copper alloy layer is remarkably lower in thickness and excellent in wear resistance, and meets the requirements of a common processing technology, like a traditional scheme adopting a sliding bearing (copper sleeve); meanwhile, in the first embodiment, the copper alloy layer 2 is formed on the surface of the planetary central shaft 3 by adopting a laser cladding technology to form a planetary central shaft-cladding layer integrated structure of the wind power gear box, so that the phenomenon of running and the like in the running process of the sliding bearing can be avoided, meanwhile, an oil duct 6, an oil passing hole, an oil storage tank and other oil supply modes are arranged in the planetary central shaft 3 to provide a good lubricating effect, the planetary central shaft-cladding layer integrated structure can shorten the traditional casting process flow, reduce the thickness of the sliding bearing, save the production cost and facilitate the promotion of product development, upgrading and updating of the sliding bearing of the wind power gear box.
The above is merely an embodiment of the present utility model, and the present utility model is not limited to the field of the present embodiment, but the specific structure and characteristics of the present utility model are not described in detail. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (8)
1. A planetary gear system with stable operation, comprising a planet carrier, a planet wheel and a planet central shaft, wherein the planet central shaft is fixed on the planet carrier, and the planetary gear system is characterized in that: the planet center shaft is a transmission shaft, the outer surface of the planet center shaft is a cladding substrate, a copper alloy layer is clad on the outer surface of the cladding substrate, a first oil duct extending axially is arranged in the planet center shaft, a second oil duct extending towards the planet center shaft is arranged in the planet carrier, and the copper alloy layer and the planet gears are lubricated in an oil lubrication mode.
2. An operation stable planetary gear system according to claim 1, wherein: the copper alloy layer is an aluminum bronze alloy layer, and the grain size range of the powder of the aluminum bronze alloy layer is 50-150 microns.
3. An operation stable planetary gear system according to claim 2, wherein: the thickness of the copper alloy layer is larger than 1.0mm, and the surface roughness is not more than 0.4 micrometers after grinding and finishing treatment, and the concave-convex height difference is not more than 0.3 mm.
4. A stable operation planetary gear system according to claim 3 wherein: the substrate material of the cladding substrate is 42CrMo4 steel, and the grinding and finish machining treatment is carried out until the surface roughness is not more than 0.8 micron.
5. An operation stable planetary gear system according to claim 4 wherein: a radial gap is formed between the copper alloy layer and the planet central shaft, and the radial gap is 0.8-1.2 per mill of the diameter of the planet central shaft.
6. An operation stable planetary gear system according to claim 5 wherein: the first oil duct comprises an axial oil duct arranged in the planet central shaft and an oil passing hole and an oil storage tank which are communicated with the axial oil duct, and lubricating oil can flow into a radial gap between the copper alloy layer and the planet central shaft through the axial oil duct, the oil passing hole and the oil storage tank in sequence in the planet central shaft.
7. An operation stable planetary gear system according to claim 6 wherein: the second oil duct comprises an axial oil duct arranged in the planet carrier and an oil passing hole and an oil storage tank which are communicated with the axial oil duct, and lubricating oil can flow into a radial gap between the copper alloy layer and the planet central shaft through the axial oil duct, the oil passing hole and the oil storage tank in sequence in the planet carrier.
8. An operation stable planetary gear system according to claim 7 wherein: the copper alloy layer is in interference fit with the planet gears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322039080.9U CN220378858U (en) | 2023-07-31 | 2023-07-31 | Planetary gear system with stable operation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322039080.9U CN220378858U (en) | 2023-07-31 | 2023-07-31 | Planetary gear system with stable operation |
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| Publication Number | Publication Date |
|---|---|
| CN220378858U true CN220378858U (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322039080.9U Active CN220378858U (en) | 2023-07-31 | 2023-07-31 | Planetary gear system with stable operation |
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| CN (1) | CN220378858U (en) |
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- 2023-07-31 CN CN202322039080.9U patent/CN220378858U/en active Active
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