CN209524046U - A kind of large power high efficiency gear assembly - Google Patents

A kind of large power high efficiency gear assembly Download PDF

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Publication number
CN209524046U
CN209524046U CN201920201414.9U CN201920201414U CN209524046U CN 209524046 U CN209524046 U CN 209524046U CN 201920201414 U CN201920201414 U CN 201920201414U CN 209524046 U CN209524046 U CN 209524046U
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gear
planet wheel
housing
input
journal bearing
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CN201920201414.9U
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陈涛
张超
邵钢
张润博
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703th Research Institute of CSIC
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703th Research Institute of CSIC
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Abstract

A kind of large power high efficiency gear assembly of the utility model, it is related to gas turbine power generating plant field, gas turbine output power is passed to gear assembly by input gear, and trisection is transferred to primary planet wheel I, primary planet wheel II, primary planet wheel III;Three planetary gears are level-one driven gear, it is corresponding coaxial form with second level driving gear secondary planet wheel I, secondary planet wheel II, secondary planet wheel III, each planetary gear is that structure is fixedly mounted in gear assembly box house, it is supported by input side radial journal bearing and outlet side radial journal bearing, amounts to six radial journal bearings.Power merging is transferred to output gear by three planetary gears, is then exported to generator.Radial journal bearing quantity is controlled at six simultaneously, and in one-stage gear pair, the radial outer periphery of secondary gear wheel set and end face install housing, improves the efficiency that gas turbine transmits output power by gear assembly to generator.

Description

A kind of large power high efficiency gear assembly
Technical field:
The utility model relates to gas turbine power generating plant fields, and in particular to a kind of large power high efficiency loading drive gear It sets.
Background technique:
Current high-power gear assembly is widely used in Gas Turbine Generating Units, and the arrangement form of unit is combustion Gas-turbine-gear assembly-generator.As the gases such as world control carbide, nitride discharge, energy utilization rate is improved Requirement constantly propose that each equipment reliability of operation and efficiency become most important in generating set.For 50MW grades or more Gas Turbine Generating Units, gear assembly high revolving speed, high load capacity operating condition under run.Gas turbine powered generator at present Loading drive gear in group is set to the parallel axle construction of single-stage, and the purpose is to reduce power transfer link and improve transmission efficiency.For Guarantee Gear Contact, bending stress within the scope of material mechanical performance allowable value, the pitch circle of usual gear needs biggish structure Size will cause the increase of pitch circle linear velocity in this way, be applied to 50MW grades or more of gear assembly, tooth at present Pitch circle linear velocity general control is taken turns between 150m/s-200m/s, operating condition is relatively extreme, its pitch circle while power increases Linear velocity can be further increased to 200m/s or more then beyond its linear velocity allowable value, but reduction pitch circle diameter can also be made It further increases and at Gear Contact, bending stress beyond allowable value range.In single-stage parallel-axes gears drive mechanism, often Generally using two radial journal bearing (sliding bearing) bearings on a gear rotor, the high-power corresponding high linear speed inputted, The operating condition of high load capacity, so that radial journal bearing is also at the operating condition of high specific pressure, high linear speed, but 50MW grades or more of tooth The radial journal bearing of wheel transmission device is typically operated in than crimping nearly 3.5Mpa, limiting condition of the axle journal linear velocity close to 100m/s Under, corresponding bearing film maximum temperature is also close to its operating limit, generally at 100 DEG C or so.For gear transmission part, Operation will cause biggish air-resistance power loss under higher pitch circle linear velocity;For radial journal bearing component, the rotor of bearing Axle journal, which operates in higher environment temperature, will need more lubricating oil to cool down, and further increase the function of gear assembly Consumption.Therefore, it is necessary to design a kind of large power high efficiency gear assembly with adapt to the mechanical output of Gas Turbine Generating Units and Power density is continuously increased, and improves the power transfer efficiency of gas turbine.
Utility model content:
The purpose of this utility model is to provide a kind of large power high efficiency gear assemblies, it is intended to guarantee to be used for 50MW grades The Gear Contact stress of the high-power gear assembly of the above Gas Turbine Generating Units, bending stress, pitch circle linear velocity with And ratio pressure, the axle journal linear velocity of radial journal bearing are within the scope of allowable value, while reducing the power of gear assembly Loss improves the efficiency that gas turbine transmits output power by gear assembly to generator.
A kind of large power high efficiency gear assembly of the utility model is by outer housing, interior cover, input gear, defeated Gear and planetary gear are constituted out, and the interior cover is fixed on the inside of outer housing, and input gear and output gear are respectively positioned on The inside of interior cover;The outer housing is by input side box body, middle housing I, middle housing II, middle housing III, output The closed box that side box body is successively spliced, inputting dress on side box body 5, there are three on input side radial journal bearing, output side box body Dress there are three outlet side radial journal bearing and input side radial journal bearing it is opposite two-by-two with the position of outlet side radial journal bearing, input side The end of radial journal bearing and outlet side radial journal bearing is respectively equipped with input side end cap and outlet side end cap, the input of input gear 1 End stretched out by input side box body, the output end of output gear is stretched out by output side box body, input gear respectively with primary planet wheel I, primary planet wheel II and primary planet wheel III are meshed, output gear respectively with secondary planet wheel I, secondary planet wheel II, two Grade planetary gear III is meshed, primary planet wheel I and secondary planet wheel I, primary planet wheel II and secondary planet wheel II, primary planet Wheel III and secondary planet wheel III are coaxial configuration and input side radial journal bearing and outlet side opposite using one group of position respectively Radial journal bearing bearing;The interior cover is by housing, one-stage gear housing, secondary gear housing and outlet side inside input side Internal housing is successively spliced, and housing and outlet side inside housing are individually fixed in input side box body and output inside input side The inner wall of side box body, one-stage gear housing are located at the outside of primary planet wheel I, primary planet wheel II and primary planet wheel III, and two Grade gear house is located at the outside of secondary planet wheel I, secondary planet wheel II, secondary planet wheel III, in input gear and level-one row What star-wheel I, primary planet wheel II and primary planet wheel III engaged nibbles out position and output gear and secondary planet wheel I, second level row What star-wheel II, secondary planet wheel III engaged nibbles out position, is equipped with spray bar.
The outer wall of the interior cover is equipped with cooling oil pipe as a further improvement of the utility model,.
The large power high efficiency gear assembly of the utility model, by using three branch of power, firsts and seconds planet Coaxially the technological means such as double radial journal bearing bearings, the interior cover of the interior arrangement of outer housing are ensured for 50MW grades or more combustion gas wheel gear The Gear Contact stress of the gear assembly of machine generating set, bending stress, the ratio pressure of pitch circle linear velocity and radial journal bearing, Axle journal linear velocity is within the scope of allowable value;Compared to single-stage parallel-axes gears drive mechanism, pitch circle size, axis Neck size (bearing bore diameter size) decreases;Radial journal bearing quantity is controlled at six simultaneously, and in one-stage gear pair, two The radial outer periphery and end face install housing of grade gear pair improve gas turbine by gear assembly and transmit output to generator The efficiency of power.
Detailed description of the invention:
Fig. 1 is the utility model structure diagram;
Fig. 2 is the utility model one-stage gear auxiliary structure schematic diagram;
Fig. 3 is the utility model secondary gear auxiliary structure schematic diagram.
In figure: input gear 1, high speed shaft axle envelope 2, input side end cap 3, input side radial journal bearing 4, input side box body 5, in Between cabinet I 6, middle housing II 7, cooling oil pipe 8, middle housing III 9, output side box body 10, outlet side radial journal bearing 11, output Side end cap 12, output gear 13, slow-speed shaft axle envelope 14, outlet side inside housing 15, secondary gear housing 16, one-stage gear housing 17, housing 18, primary planet wheel II 19, spray bar 20, primary planet wheel I 21, secondary planet wheel III 22, level-one inside input side Planetary gear III 23, secondary planet wheel I 24, secondary planet wheel II 25.
Specific embodiment:
It is by outer housing, interior cover, defeated as shown in Figure 1, a kind of large power high efficiency gear assembly of the utility model Enter gear 1, output gear 13 and planetary gear are constituted, the interior cover is fixed on the inside of outer housing, input gear 1 and defeated Gear 13 is respectively positioned on the inside of interior cover out;The outer housing is by input side box body 5, middle housing I 6, middle housing II 7, the closed box that middle housing III 9, output side box body 10 are successively spliced, inputting dress on side box body 5, there are three input sides There are three outlet side radial journal bearing 11 and input side radial journal bearing 4 and output are collateral for dress on radial journal bearing 4, output side box body 10 The position for holding bearing 11 is opposite two-by-two, and the end of the input side radial journal bearing 4 and outlet side radial journal bearing 11 is respectively equipped with Input side end cap 3 and outlet side end cap 12;The input terminal of input gear 1 is stretched out by input side box body 5, the output of output gear 13 End stretched out by output side box body 10, input gear 1 respectively with primary planet wheel I 21, primary planet wheel II 19 and primary planet wheel III 23 are meshed, and output gear 13 is meshed with secondary planet wheel I 24, secondary planet wheel II 25, secondary planet wheel III 22 respectively, Primary planet wheel I 21 and secondary planet wheel I 24, primary planet wheel II 19 and secondary planet wheel II 25, III 23 and of primary planet wheel Secondary planet wheel III 22 is coaxial configuration and is supported respectively using the opposite input side radial journal bearing 4 in one group of position and outlet side Bearing 11 supports;The interior cover is by housing 18 inside input side, one-stage gear housing 17, secondary gear housing 16 and defeated Housing 15 is successively spliced inside side out, and the outer wall of the interior cover is equipped with cooling oil pipe 8.18 He of housing inside input side Housing 15 is individually fixed in input side box body 5 and exports the inner wall of side box body 10 inside outlet side, and one-stage gear housing 17 is located at The outside of primary planet wheel I 21, primary planet wheel II 19 and primary planet wheel III 23, secondary gear housing 16 are located at secondary planet Take turns the outside of I 24, secondary planet wheel II 25, secondary planet wheel III 22;In input gear 1 and primary planet wheel I 21, primary planet Take turns II 19 and primary planet wheel III 23 engage nibble out position and output gear 13 and secondary planet wheel I 24, secondary planet wheel II 25, what secondary planet wheel III 22 engaged nibbles out position, is equipped with spray bar 20.
A kind of large power high efficiency loading drive gear of the utility model is set to double-reduction gear driving form, gas turbine Output power is passed to gear assembly by input gear 1, and trisection is transferred to primary planet wheel I 21, primary planet wheel II 19, primary planet wheel III 23;Three planetary gears are level-one driven gear, with second level driving gear secondary planet wheel I 24, two Grade planetary gear II 25, secondary planet wheel III 22 are corresponding coaxial form, and each planetary gear is in gear assembly cabinet Portion is that structure is fixedly mounted, and is supported by input side radial journal bearing 4 and outlet side radial journal bearing 11, and six radial journal bearings are amounted to. Power merging is transferred to output gear 13 by three secondary planetary gears, is then exported to generator.
Input gear 1 and output gear 13 are fixed by three planetary gears, no radial journal bearing bearing.Loading drive gear Set input side and high speed shaft axle envelope 2(two-half structure be installed), outlet side is equipped with slow-speed shaft axle envelope 14(two-half structure);Often Input side end cap 3 and outlet side end cap 12 are installed at the input of two radial journal bearings of a planetary gear and output side box body. Input gear 1 forms one-stage gear with three primary planet wheels I 21 engaged, primary planet wheel II 19, primary planet wheel III 23 Drive mechanism, output gear 13 and secondary planet wheel I 24, secondary planet wheel II 25, secondary planet wheel III 22 form secondary gear Drive mechanism.The radial outer periphery of one-stage gear transmission is equipped with one-stage gear housing 17, the radial outer periphery installation of secondary gear wheel set There is secondary gear housing 16;One-stage gear housing 17 is consolidated by coupling with housing 18 inside input side, and by input side box body 5 It is fixed;Secondary gear housing 16 is fixed by coupling with housing 15 inside outlet side, and by output side box body 10;Level-one tooth simultaneously Wheel housing 17 is connected with secondary gear 16.
Cooling oil pipe 8 is installed, structure is that general pipeline introduces gear assembly and branch's two-way oil pipe outside inner cover body It is respectively arranged in the outside of one-stage gear housing 17 and secondary gear housing 16.Axial cabinet edge is five sections of split type structures, defeated Enter side box body 5 and is coupled with output side box body 10 by middle housing I 6, middle housing II 7, middle housing III 9.In one-stage gear Transmission three at gear engagement nibble out position, and at double geared three gear engage nibble out position, be equipped with Spray bar 20 is lubricated cooling to mesh tooth face.The gear assembly is transmitted by the route of three branch of power and is reduced Pitch circle diameter, the gear diameter of axle and bearing arrangement size, it is ensured that Gear Contact stress, bending stress, pitch circle Linear velocity and the ratio pressure of radial journal bearing, axle journal linear velocity are within the scope of allowable value;The load of gear and radial journal bearing, linear speed The reduction of degree is so that the power loss that the two generates is reduced;Radial journal bearing quantity is controlled at six, axis is accordingly controlled The power loss that neck operates within the bearing;Housing knot is installed in the radial outer periphery and end face of one-stage gear pair and secondary gear wheel set Structure reduces the space of gear agitation gas mixture, and the apron space of gear is isolated with the high-temperature area of radial journal bearing, So that gear-driven air-resistance power loss is greatly lowered;Cooling line is installed in internal housing outer surface, and then reduces tooth The temperature for taking turns apron space, further decreases the power loss of gear assembly.
The geometric parameter of the planetary gear one-stage gear is completely the same, the geometric parameter of secondary gear also complete one It causes, supports and positioned in gear assembly, three rows by input side radial journal bearing 4, outlet side radial journal bearing 11 respectively Star gear in gear assembly circumferentially arrange by 120 ° of equal parts.Primary planet wheel I 21, primary planet wheel II 19, level-one row Star-wheel III 23 will transmit the 1/3 of input general power respectively.Since the gear geometry parameter of three branch of power is consistent, one-stage gear is passed The radial engagement force of dynamic each pair of mesh tooth face generation, circumferential engagement force size are identical, by the gear engaging stress of input gear 1 After direction composition, it is zero that engagement force is bent resultant force and offsets to axle journal, therefore input gear 1 can not pass through radial journal bearing branch It holds, it is only necessary to support and realize by three planetary gears and positioned in gear assembly.
Primary planet wheel I 21, primary planet wheel II 19 and primary planet wheel III 23 respectively transmit 1/3 input general power Output gear 13 is incorporated into after to secondary planet wheel I 24, secondary planet wheel II 25 and secondary planet wheel III 22 then to export to hair Motor.Due to only a pair of of flank engagement of single-stage parallel-axes gears drive mechanism, it is therefore desirable to biggish pitch circle size Reduce gear mesh force so guarantee Gear Contact stress allowable, bending stress within the scope of material mechanical performance allowable value, and Correspondence increases pitch circle linear velocity;Have simultaneously between the input gear 1 of the utility model, output gear 13 and planetary gear Three pairs of flank engagements, and the 1/3 of each pair of transmitting general power, therefore the pitch diameter of each gear is compared to single-stage parallel axes tooth Wheel drive mechanism correspondingly reduces;Even if the contact stress of each pair of engagement gear teeth, bending stress are allowable close to material mechanical performance When value, also greatly reduce compared to the pitch circle linear velocity of single-stage parallel-axes gears drive mechanism (verified to reduce by 30% Left and right);Correspondingly, gear mesh force reduction so that input side radial journal bearing 4 and outlet side radial journal bearing 11 bearings ratio to press Reduce therewith, the reduction of gear shaft neck so that input side radial journal bearing 4 and outlet side radial journal bearing 11 axle journal linear velocity Reduce therewith, the oil film maximum temperature of radial journal bearing reduces therewith, and the overall power loss of radial journal bearing is reduced with running temperature And it reduces;In conclusion compared to single-stage parallel-axes gears drive mechanism, the gear assembly of the utility model is applicable to The Gas Turbine Generating Units of more high-power grade are run;For the Gas Turbine Generating Units of same power grade, although this The gear quantity and number of bearings of the gear assembly of utility model are more than single-stage parallel-axes gears drive mechanism, but supporting axis Make as main power loss source, quantity is controlled at six, and due to contact force, pitch circle linear velocity, bearings ratio to press with And the reduction of axle journal linear velocity is so that the power loss of the utility model gear assembly is driven compared to single-stage parallel-axes gears Structure decreases.
In conjunction with Fig. 1, Fig. 2 and Fig. 3, radially periphery is equipped with one-stage gear housing 17 to one-stage gear pair, close to input side Housing 18 inside input side is installed;Radially periphery is equipped with secondary gear housing 16 to secondary gear wheel set, pacifies close to outlet side Equipped with housing 15 inside outlet side;Above-mentioned four partial interiors housing contracts running space of the geared parts in gear assembly It is small, and keep apart with the hot operation space of radial journal bearing.The installation of one-stage gear housing 17 and secondary gear housing 16 can The air-resistance power loss generated during gear operation is effectively reduced, reduces gear and stirs high-temperature oil gas mixing during operation The space of object, at the same inside input side inside housing 18 and outlet side housing 15 installation so that radial journal bearing in the process of running The high-temperature area of generation reduces the ambient temperature effect of gear running space.Internal housing is installed in internal housing outer surface Cool down oil pipe 8, and in gear-box operation process, a small amount of lubricating oil will equably be sprayed at one-stage gear housing 17 and secondary gear housing 16 outer surfaces, and then the surface temperature of cooling two parts housing, while it can be effectively reduced the environment temperature of gear operation, into one Step reduces the air-resistance power loss of gear operation generation.Spray bar 20 is introduced by input side box body 5 and output side box body 10 Gear assembly is used for the lubrication of one-stage gear pair and secondary gear wheel set.When pitch circle linear velocity is greater than 90m/s, tooth Side spray oil lubrication cooling is nibbled out in shown position, that is, gear in wheel transmission device;When pitch circle linear velocity is less than 90m/s, gear It is cooling that transmission device will be changed to gear advancing side oil jet lubrication.One-stage gear housing 17 and 16 bottom of secondary gear housing are spacious Open architecture is back to gear assembly bottom, while 16 distance of one-stage gear housing 17 and secondary gear housing for lubricating oil The distance of the flank of tooth also ensures that gear lubricating oil smooth can flow back, and will not locally retain in internal housing and geared parts is caused to stir oil The generation of phenomenon.
Gear assembly cabinet is adding man-hour requirement that will input side box body 5, middle housing I 6, middle housing II 7, centre Boring guarantee primary planet wheel I 21, primary planet wheel II 19, primary planet wheel after cabinet III 9, output side box body 10 combine III 23, secondary planet wheel I 24, secondary planet wheel II 25, secondary planet wheel III 22 and input side radial journal bearing 4, outlet side are supported Concentricity of the mounting hole of bearing 11 in input side, outlet side;And guarantee input gear 1, output gear 13 and high speed shaft axle envelope 2, concentricity of the mounting hole of slow-speed shaft axle envelope 14 in input side, outlet side;And guarantee the depth of parallelism morpheme in above-mentioned four hole simultaneously Tolerance.When gear assembly assembles, by the assemble sequence of input side to outlet side, detailed process is as follows: (1) will input After side box body 5 positions on installation rack, inserting is packed into three input side radial journal bearings 4, and housing 18 inside input side is consolidated It is scheduled on input side box body 5;(2) combination is packed into primary planet wheel I 21, primary planet wheel II 19, primary planet wheel III 23, defeated Enter gear 1, can need to successively be inserted when being straight tooth structure using special tooling fixed integral installation when gear is monocline toothing Dress, and high speed shaft axle envelope 2 is installed;(3) spray bar 20 of input terminal side is introduced to gear drive outside input side box body 5 Device, and couple housing 18, one-stage gear housing 17 and secondary gear housing 16 inside input side;(4) installation cooling oil pipe 8, And coupling input side cabinet 5, middle housing I 6 and middle housing II 7, cooling oil pipe 8 draws gear by spare interface on cabinet Transmission device;(5) couple outlet side inside housing 15 to secondary gear housing 16;(6) output side box body 10 is being installed into rack Upper positioning, inserting be packed into three outlet side radial journal bearings 11, and along output to input side axially it is flat-pushing make secondary planet wheel I 24, Secondary planet wheel II 25, secondary planet wheel III 22 are inserted into outlet side radial journal bearing 11, and install slow-speed shaft axle envelope 14 to output Side box body 10 is connected and fixed housing inside outlet side by the spare interface on output side box body 10 outside gear assembly 15;(7) spray bar 20 of output end side is introduced to gear assembly outside output side box body 5;(8) above-mentioned each component Couple it is compact after, middle housing III 9 and middle housing II 7 and output side box body 10 are coupled, and three input side end caps 3 are installed And three outlet side end caps 12 are to gear assembly cabinet;It (9), must will be high when gear assembly is in units' installation pair Fast axis axle envelope 2, slow-speed shaft axle envelope 14 replace with identical structure small―gap suture tooling, two toolings and input gear 1, output gear 13 Radial clearance is not more than 0.05mm, and two axle envelopes of installation are replaced after the completion of centering.So far, entire large power high efficiency gear drive is completed The assembly work of device.

Claims (2)

1. a kind of large power high efficiency gear assembly, be by outer housing, interior cover, input gear (1), output gear (13) and Planetary gear is constituted, it is characterised in that the interior cover is fixed on the inside of outer housing, input gear (1) and output gear (13) it is respectively positioned on the inside of interior cover;The outer housing is by input side box body (5), middle housing I (6), middle housing II (7), the closed box that middle housing III (9), output side box body (10) are successively spliced, inputs and is equipped with three on side box body (5) There are three outlet side radial journal bearing (11) and input side supporting axis for dress on a input side radial journal bearing (4), output side box body (10) Hold (4) it is opposite two-by-two with the position of outlet side radial journal bearing (11), input side radial journal bearing (4) and outlet side radial journal bearing (11) End be respectively equipped with input side end cap (3) and outlet side end cap (12), the input terminal of input gear (1) is by input side box body (5) stretch out, the output end of output gear (13) is stretched out by output side box body (10), input gear (1) respectively with primary planet wheel I (21), primary planet wheel II (19) and primary planet wheel III (23) are meshed, output gear (13) respectively with secondary planet wheel I (24), secondary planet wheel II (25), secondary planet wheel III (22) are meshed, primary planet wheel I (21) and secondary planet wheel I (24), primary planet wheel II (19) and secondary planet wheel II (25), primary planet wheel III (23) and secondary planet wheel III (22) are equal It is supported for coaxial configuration and respectively using the opposite input side radial journal bearing (4) in one group of position and outlet side radial journal bearing (11); The interior cover is by housing (18), one-stage gear housing (17), secondary gear housing (16) and outlet side inside input side Internal housing (15) is successively spliced, and housing (18) and outlet side inside housing (15) are individually fixed in input inside input side Side box body (5) and the inner wall for exporting side box body (10), one-stage gear housing (17) are located at primary planet wheel I (21), primary planet The outside of II (19) and primary planet wheel III (23) is taken turns, secondary gear housing (16) is located at secondary planet wheel I (24), secondary planet The outside for taking turns II (25), secondary planet wheel III (22), in input gear (1) and primary planet wheel I (21), primary planet wheel II (19) and out position and output gear (13) and secondary planet wheel I (24), secondary planet are nibbled in primary planet wheel III (23) engagement What II (25) of wheel, secondary planet wheel III (22) engaged nibbles out position, is equipped with spray bar (20).
2. a kind of large power high efficiency gear assembly as described in claim 1, it is characterised in that the outer wall of the interior cover Equipped with cooling oil pipe (8).
CN201920201414.9U 2019-02-15 2019-02-15 A kind of large power high efficiency gear assembly Active CN209524046U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109707801A (en) * 2019-02-15 2019-05-03 中国船舶重工集团公司第七0三研究所 A kind of large power high efficiency gear assembly
CZ310174B6 (en) * 2023-07-21 2024-10-23 Wikov Gear s.r.o A transmission

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109707801A (en) * 2019-02-15 2019-05-03 中国船舶重工集团公司第七0三研究所 A kind of large power high efficiency gear assembly
CN109707801B (en) * 2019-02-15 2023-12-22 中国船舶重工集团公司第七0三研究所 High-power efficient gear transmission device
CZ310174B6 (en) * 2023-07-21 2024-10-23 Wikov Gear s.r.o A transmission

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