CN114526323A

CN114526323A - Lubricating oil circuit system of ultra-high-speed planetary gear box

Info

Publication number: CN114526323A
Application number: CN202210089522.8A
Authority: CN
Inventors: 傅琳; 常山; 蒋立冬; ***; 陈芃樾
Original assignee: 703th Research Institute of CSIC
Current assignee: 703th Research Institute of CSIC
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-05-24
Anticipated expiration: 2042-01-25
Also published as: CN114526323B

Abstract

A lubrication oil circuit system of an ultra-high speed planetary gear box relates to a lubrication oil circuit system. The invention solves the problem that the prior lubricating oil path system causes partial failure of the gear because the lubricating oil can not be uniformly and completely sprayed on the gear. The oil-spraying device comprises a gear box body (50), an oil circuit system, a pinion oil-spraying pipe (21) and a plurality of spray heads (52), wherein the oil circuit system is arranged in the gear box body (50) and supplies oil, the pinion oil-spraying pipe (21) is horizontally arranged on a supporting plate (9), and the pinion oil-spraying pipe (21) is communicated with an oil inlet on the supporting plate (9); a plurality of round holes (51) are formed in the pinion oil spraying pipe (21) along the axis direction of the pinion oil spraying pipe, each round hole (51) is provided with a spray head (52), and the spray heads (52) face the pinion in the gear box body (50). The invention is used for lubricating and cooling the ultra-high-speed planetary gearbox.

Description

Lubricating oil circuit system of ultra-high-speed planetary gearbox

Technical Field

The invention relates to a lubricating oil path system, in particular to a lubricating oil path system of an ultra-high-speed planetary gear box, and belongs to the field of gas volume flow sensors.

Background

The gear transmission is an important transmission form for transmitting power, and plays an important role in the fields of automobiles, ships, aerospace, aviation and the like. The power of the planetary gear box is output coaxially after being divided by a plurality of planet wheels, and the planetary gear box has the characteristics of small volume, light weight, large speed ratio and the like and is widely applied.

With the development of science and technology and the improvement of use demand, the gear transmission power gradually becomes big, the rotational speed gradually rises, and the design requirement to the gear box also is higher and higher. For an ultra-high speed planetary gearbox, the rotating speed of the high-speed end reaches 72000r/min, and the linear speed reaches 180 m/s. The arrangement structure of the lubricating oil path directly influences the success or failure of the gearbox and is of great importance. The arrangement of the lubricating oil path is mainly used for lubricating and cooling the ultra-high speed planetary gearbox.

In the utility model patent of publication No. CN201448430U, a lubricated oil piping system of self-powered formula for planetary gear drive is disclosed, this utility model patent realizes lubricating through oil distribution pipeline and lubricated pipeline, especially lubricates and cools off the gear through the baffle with lubricating oil splash back to the shaft coupling. The utility model discloses a although effectual solution to the lubrication and the cooling of each inside gear of gear box, its oil spout pipe is carrying out the oil spout in-process, and its injection face and injection angle and injection in-process receive the influence of factors such as gear rotational speed air current, and the unable even complete of lubricating oil is sprayed to the gear on, leads to the gear part to become invalid, like the circumstances such as flank of tooth point loses or flank of tooth veneer. Therefore, the problem that the gear is partially failed due to the fact that lubricating oil cannot be uniformly and completely sprayed to the gear in the conventional lubricating oil path system is solved.

Disclosure of Invention

The invention aims to solve the problem that the gear is partially failed due to the fact that lubricating oil cannot be uniformly and completely sprayed onto the gear in the conventional lubricating oil way system. Further provides a lubricating oil path system of the ultra-high speed planetary gearbox.

The invention has the technical scheme that the lubricating oil circuit system of the ultra-high-speed planetary gearbox comprises a gearbox body, an oil circuit system, a pinion oil injection pipe and a plurality of spray heads, wherein the oil circuit system is arranged in the gearbox body and supplies oil; a plurality of round holes are formed in the pinion oil injection pipe in the axis direction, a spray head is installed in each round hole, and the spray heads face the pinion in the gear box body.

Furthermore, the nozzle is an oval nozzle, and a plurality of first oil nozzles are formed in the oval nozzle along the minor axis direction of the oval nozzle.

Further, the first oil jet is an arc-shaped oil jet.

Furthermore, the spray head is rotatably embedded in the round hole.

Furthermore, the shower nozzle is "T" shape shower nozzle of falling, and a plurality of second oil jets have been seted up along its direction of height to "T" shape shower nozzle.

Further, the second oil spout is arc oil spout.

Further, the spray head is clamped in the round hole.

Furthermore, the device also comprises a transmission shaft, a first sliding bearing, an end cover, a planet carrier, a second rolling bearing, a first oil pipe, an inner gear ring, a third sliding bearing, a support plate, a gearwheel, a planet wheel, a fourth sliding bearing, an oil plug, a pinion, a support, a fifth sliding bearing, a first auxiliary support, a second auxiliary support, a middle floating shaft, an output shaft, a first oil pipe, a second oil pipe and a plug, wherein the first sliding bearing is sleeved on the transmission shaft, the end cover is sleeved on the first sliding bearing, the inner gear ring is sleeved on the transmission shaft, the planet carrier is sleeved on the transmission shaft and positioned on the inner side of the inner gear ring, the fourth sliding bearing is sleeved on the transmission shaft, the support plate is arranged on the fourth sliding bearing, the oil plug is arranged at the end part of the transmission shaft and positioned on the fourth sliding bearing, the planet wheel is arranged on the support plate and meshed with the inner gear ring, and the end part of the planet wheel is connected with the planet carrier through the second rolling bearing, a first oil pipe is arranged between the end cover and the support plate, and a second oil pipe is arranged between the planet carrier and the support plate; the gear wheel suit is on the planet wheel, install third slide bearing between gear wheel and the backup pad, the support mounting is in the gear box body, pinion cartridge is in the support, and install fifth slide bearing between pinion and the support, pinion and gear engagement, install first oil pipe between backup pad and the support, first auxiliary stay and second auxiliary stay are installed on the right side of support from left to right in proper order, middle floating shaft level is worn to establish in first auxiliary stay and the second auxiliary stay, and the one end and the pinion connection of middle floating shaft, the other end and the output shaft that is located the gear box body outside of middle floating shaft.

Furthermore, the oil circuit system comprises an oil circuit of an oil inlet outside the gear box, an oil circuit of a large gear support bearing, an oil circuit of a planet gear support bearing, an oil circuit of a parallel shaft gear meshing oil supply, an oil circuit of a planet gear meshing oil supply, an oil circuit of a high-speed input end and 2 oil circuits of low-speed transmission shafts for supporting bearings; an oil inlet outside the gear box is arranged on the support plate; lubricating oil is directly supplied to a sliding bearing for supporting the large gear through an oil hole in the supporting plate; lubricating oil enters the oil hole of the planet carrier from the oil hole on the supporting plate through an oil pipe and is supplied to a sliding bearing of the planet wheel; lubricating oil enters the pinion oil injection pipe from the oil hole in the supporting plate and supplies oil to the meshing part of the large gear and the pinion; lubricating oil enters the oil pipe from the oil hole on the supporting plate and supplies the oil to the meshing part of the planet wheel and the inner gear ring; lubricating oil enters the oil hole on the bracket from the oil hole on the supporting plate through an oil pipe, wherein one path of the lubricating oil is supplied to the fifth sliding bearing, and the other path of the lubricating oil is respectively supplied to a first tooth-type coupling consisting of the inner teeth of the input end of the pinion and the intermediate floating shaft and a second tooth-type coupling consisting of the inner teeth of the output shaft and the intermediate floating shaft through the oil hole; lubricating oil enters the oil hole in the end cover from the oil hole in the supporting plate through an oil pipe and is supplied to the sliding bearing; the lubricating oil is directly supplied to the sliding bearing from the oil hole on the supporting plate.

Furthermore, the filter screen is arranged above the radial through holes on the inner teeth at the input end of the pinion and the inner teeth of the inner gear ring.

Compared with the prior art, the invention has the following improvement effects:

1. the lubricating oil path arrangement structure of the ultra-high-speed planetary gear box is simple in structure, exquisite in design, convenient to mount and dismount, and good in maintainability and accessibility.

2. The lubricating oil circuit arrangement structure of the ultra-high speed planetary gearbox can be used in occasions with high transmission rotating speed, and is up to 72000r/min, and the application range is wide.

3. The lubricating oil circuit arrangement structure of the ultra-high-speed planetary gearbox fully utilizes the internal structure of parts, is designed ingeniously, and saves the space and the weight of the gearbox.

4. The invention is especially designed for the oil injection pipe of the pinion with high-speed output, the plurality of spray heads are arranged on the oil injection pipe of the pinion, each spray head is provided with an arc-shaped oil injection port, so that the spray heads generate a rotary injection force in the injection process, the injection force is realized by adjusting the pressure of a lubricating oil inlet, and the lubricating oil sprayed by the spray heads is quickly stirred into the meshing part of the bull gear and the pinion under the action of air flow and inertia force when the pinion turns to the bull gear to be meshed, thereby ensuring the lubricating and cooling effects between the gears.

5. The spray head is arranged along the length direction of the pinion oil pipe, so that no blind area can be ensured in the axis direction of the pinion, the lubrication and cooling of the full gear are realized, and the problem of partial failure of the gear is further reduced and avoided.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention. Fig. 2 is a schematic view of a pinion oil pipe when the head is in an oval shape, fig. 3 is a schematic view of an oval-shaped head, fig. 4 is a schematic view of a pinion oil pipe when the head is in an inverted "T" shape, fig. 5 is a schematic view of an inverted "T" shaped head, and fig. 6 is a schematic view of a filter screen 54.

Detailed Description

The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 5, and the ultra-high speed planetary gearbox lubricating oil path system of the embodiment comprises a gearbox body 50 and an oil path system, wherein the oil path system is arranged in the gearbox body 50 and supplies oil, the ultra-high speed planetary gearbox lubricating oil path system further comprises a pinion oil spraying pipe 21 and a plurality of spray heads 52, the pinion oil spraying pipe 21 is horizontally arranged on a support plate 9, and the pinion oil spraying pipe 21 is communicated with an oil inlet on the support plate 9; the pinion oil jet pipe 21 is opened with a plurality of circular holes 51 along the axial direction thereof, and each circular hole 51 is mounted with a nozzle 52, and the nozzle 52 faces the pinion in the gear box body 50.

The lubricating oil path arrangement structure of the ultra-high-speed planetary gear box is used for lubricating and cooling the ultra-high-speed gear box, the arrangement structure is simple and direct, the internal structure of parts is fully utilized, the design is exquisite, the space and the weight are saved, the gear box is enabled to obtain a more compact structure on the basis of ensuring full lubrication and cooling, and the weight is lighter.

Especially, the design of the spray head is carried out on the pinion oil spraying pipe, and the lubricating and cooling effects of the gearbox are improved.

The second embodiment is as follows: referring to fig. 2 to 3, the nozzle 52 of the present embodiment is an elliptical nozzle, and a plurality of first oil injection ports 53 are formed in the elliptical nozzle along a minor axis direction of the elliptical nozzle. With the arrangement, the oval oil injection can rotate horizontally under the combined action of oil pressure and the shape of the nozzle, and the divergence of the sprayed lubricating oil is ensured. Other components and connections are the same as in the first embodiment.

The third concrete implementation mode: the present embodiment is described with reference to fig. 2 to 3, and the first oil jet 53 of the present embodiment is an arc-shaped oil jet. So set up, the arc nozzle can change the direction that lubricating oil erupted and disperse outward. Other compositions and connections are the same as in the first or second embodiments.

The fourth concrete implementation mode: the present embodiment will be described with reference to fig. 2 to 3, and the head 52 of the present embodiment is rotatably fitted into the circular hole 51. So set up, be convenient for increase the shower nozzle and spout the radiating surface of lubricating oil. Other compositions and connection relationships are the same as in the first, second or third embodiment.

The fifth concrete implementation mode: referring to fig. 4 and 5, the nozzle 52 of the present embodiment is an inverted "T" shaped nozzle, and a plurality of second oil injection ports 53 are opened along the height direction of the inverted "T" shaped nozzle. Due to the arrangement, the horizontal section of the spray head can be firmly clamped in the pinion oil pipe, and the spray head cannot be damaged due to the change of oil pressure; other compositions and connection relationships are the same as those in the first, second, third, or fourth embodiment.

The sixth specific implementation mode is as follows: the present embodiment will be described with reference to fig. 5, and the second oil jet 53 of the present embodiment is an arc-shaped oil jet. So set up, be convenient for guarantee to spout the radiant surface of lubricating oil great. Other compositions and connection relations are the same as those of the first embodiment, the second embodiment, the third embodiment, the fourth embodiment or the fifth embodiment.

The seventh embodiment: the present embodiment will be described with reference to fig. 4, and the head 52 of the present embodiment is fitted in the circular hole 51. So set up, be convenient for guarantee oil pipe's intensity, the installation of shower nozzle is also more firm moreover. Other components and connection relations are the same as those of any one of the first to sixth embodiments.

The specific implementation mode is eight: the embodiment is described with reference to fig. 1, and the embodiment further includes a transmission shaft 1, a first sliding bearing 2, an end cover 3, a planet carrier 4, a second rolling bearing 5, a first oil pipe 6, an inner gear ring 7, a third sliding bearing 8, a support plate 9, a gearwheel 10, a planet wheel 11, a fourth sliding bearing 12, an oil block 13, a pinion 14, a support 15, a fifth sliding bearing 16, a first auxiliary support 17, a second auxiliary support 18, a middle floating shaft 19, an output shaft 20, a first oil pipe 22, a second oil pipe 23 and a plug 24, the first sliding bearing 2 is sleeved on the transmission shaft 1, the end cover 3 is sleeved on the first sliding bearing 2, the inner gear ring 7 is sleeved on the transmission shaft 1, the planet carrier 4 is sleeved on the transmission shaft 1 and is located on the inner side of the inner gear ring 7, the fourth sliding bearing 12 is sleeved on the transmission shaft 1, the support plate 9 is installed on the fourth sliding bearing 12, the oil block 13 is installed on the end of the transmission shaft 1 and is located on the fourth sliding bearing 12, the planet gear 11 is arranged on the supporting plate 9, the planet gear 11 is meshed with the inner gear ring 7, the end part of the planet gear 11 is connected with the planet carrier 4 through the second rolling bearing 5, the first oil pipe 6 is arranged between the end cover 3 and the supporting plate 9, and the second oil pipe 23 is arranged between the planet carrier 4 and the supporting plate 9; a large gear 10 is sleeved on a planet gear 11, a third sliding bearing 8 is installed between the large gear 10 and a supporting plate 9, a support 15 is installed in a gear box body 50, a small gear 14 is inserted in the support 15, a fifth sliding bearing 16 is installed between the small gear 14 and the support 15, the small gear 14 is meshed with the large gear 10, a first oil pipe 22 is installed between the supporting plate 9 and the support 15, a first auxiliary support 17 and a second auxiliary support 18 are sequentially installed on the right side of the support 15 from left to right, a middle floating shaft 19 is horizontally arranged in the first auxiliary support 17 and the second auxiliary support 18 in a penetrating mode, one end of the middle floating shaft 19 is connected with the small gear 14, and the other end of the middle floating shaft 19 is connected with an output shaft 20 located on the outer side of the gear box body 50. Other constitutions and connection relations are the same as those of any one of the first to seventh embodiments.

The specific implementation method nine: the embodiment is described with reference to fig. 1, and the oil path system of the embodiment includes an oil path of an external oil inlet of a gear box, an oil path of a supporting bearing of a gearwheel 10, an oil path of a supporting bearing of a planet wheel 11, an oil path of a meshing oil supply of a parallel shaft gear, an oil path of a meshing oil supply of a planet gear, an oil path of an input end of a high-speed stage, and 2 oil paths of supporting bearings of a low-speed stage transmission shaft;

an oil inlet outside the gearbox is arranged on the support plate 9; the lubricating oil is directly supplied to a sliding bearing 8 supporting a large gear 10 through an oil hole on a supporting plate 9; lubricating oil enters the oil hole of the planet carrier 4 from the oil hole on the supporting plate 9 through the oil pipe 23 and supplies the oil to the sliding bearing 5 of the planet wheel 11; lubricating oil enters a pinion oil injection pipe 21 from an oil hole in the support plate 9 and supplies oil to the meshing part of the large gear 10 and the small gear 14; lubricating oil enters an oil pipe 23 from an oil hole in the support plate 9 and is supplied to the meshing part of the planet wheel 11 and the inner gear ring 7; lubricating oil enters the oil holes on the bracket 15 from the oil holes on the supporting plate 9 through an oil pipe 22, wherein one path of the lubricating oil is supplied to the fifth sliding bearing 16, and the other path of the lubricating oil is respectively supplied to a first tooth type coupling consisting of the inner teeth of the input end of the pinion 14 and the intermediate floating shaft 19 and a second tooth type coupling consisting of the inner teeth of the output shaft 20 and the intermediate floating shaft 19 through the oil holes; lubricating oil enters the oil hole in the end cover 3 from the oil hole in the supporting plate 9 through the oil pipe 6 and is supplied to the sliding bearing 2; the lubricating oil is directly supplied to the sliding bearing 12 from the oil hole in the support plate 9. So set up, arrangement structure is simple, direct, make full use of part inner structure, and the design is exquisite, has saved space and weight, makes the gear box guarantee fully lubricated and refrigerated basis on, has obtained the structure compacter, and weight is lighter. Other compositions and connection relations are the same as those of any one of the first to eighth embodiments.

The detailed implementation mode is ten: the present embodiment is described with reference to fig. 6, and the present embodiment further includes a filter 54, and the filter 54 is installed above the radial through holes provided in the internal teeth of the input end of the pinion 14 and the internal teeth of the ring gear 7. So set up, carry out prefilter through setting up the lubricating oil of filter screen in to whole gear box, when treating to overhaul, take out the clearance in the lump, prevent that the oil-out from blockking up. And the inner teeth at the input end of the pinion and the inner teeth of the inner gear ring are provided with radial through holes for throwing lubricating oil into the box body by centrifugal force to flow out.

The filter screen 54 of the embodiment comprises a support frame body 54-1, a screen body 54-2 and a shielding enclosure 54-3, wherein the screen body 54-2 is installed on the support frame body 54-1, the shielding enclosure 54-3 is installed around the screen body 54-2, and the cross section of the shielding enclosure 54-3 is triangular, so that lubricating oil can be conveniently received and filtered.

The working principle of the invention is explained in conjunction with fig. 1 to 6:

when the oil-gas separator is actually used, oil needs to be pumped by an external mechanical pump, the specific principle is the prior art, and the detailed description is omitted here. An oil inlet outside the gear box is arranged on a supporting plate and mainly supplies oil to 5 parts such as a gear meshing part, a sliding bearing and the like, and the parts are respectively a planet wheel and large gear assembly supporting bearing, a parallel shaft gear meshing part, a planet gear meshing part, a high-speed stage input end and a low-speed stage transmission shaft supporting bearing.

Wherein, the bull gear supports the bearing oil supply: the lubricating oil is directly supplied to the sliding bearing for supporting the bull gear through the oil hole on the supporting plate.

Supplying oil to a planet wheel support bearing: lubricating oil enters the oil hole of the planet carrier from the oil hole on the supporting plate through the oil pipe, and the lubricating oil is supplied to the sliding bearing of the planet wheel.

Oil supply by meshing of parallel shaft gears: the lubricating oil enters the oil pipe from the oil hole on the supporting plate and is supplied to the meshing part of the big gear and the small gear.

Planetary gear meshing oil supply: lubricating oil enters the oil pipe from the oil hole on the supporting plate, and a meshing part for supplying the planet wheel and the inner gear ring is arranged.

Oil supply at the high-speed input end: lubricating oil enters the oil hole on the bracket from the oil hole on the supporting plate through an oil pipe, wherein one path of the lubricating oil is supplied to the sliding bearing, and the other path of the lubricating oil is respectively supplied to the gear coupling 1 consisting of the inner teeth of the input end of the pinion and the middle floating shaft and the gear coupling 2 consisting of the inner teeth of the transmission shaft and the middle floating shaft through the oil hole.

2 support bearing oil supplies of low-speed stage transmission shaft: lubricating oil enters the oil hole on the end cover from the oil hole on the supporting plate through an oil pipe and supplies oil to a sliding bearing; the lubricating oil is directly supplied to the other sliding bearing from the oil hole on the supporting plate.

And the inner teeth at the input end of the pinion and the inner teeth of the inner gear ring are provided with radial through holes for throwing lubricating oil into the box body by centrifugal force to flow out.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a lubricated oil piping system of hypervelocity planetary gear case, it includes gear box body (50), its characterized in that: the gearbox is characterized by further comprising an oil circuit system, a pinion oil injection pipe (21) and a plurality of spray heads (52), wherein the oil circuit system is arranged in the gearbox body (50) and supplies oil, the pinion oil injection pipe (21) is horizontally arranged on the supporting plate (9), and the pinion oil injection pipe (21) is communicated with an oil inlet in the supporting plate (9);

a plurality of round holes (51) are formed in the pinion oil spraying pipe (21) along the axis direction of the pinion oil spraying pipe, each round hole (51) is provided with a spray head (52), and the spray heads (52) face the pinion in the gear box body (50).

2. The ultra-high speed planetary gearbox lubricating oil circuit system as claimed in claim 1, wherein: the spray head (52) is an oval spray head, and a plurality of first oil nozzles (53) are formed in the oval spray head along the minor axis direction of the oval spray head.

3. The ultra-high speed planetary gearbox lubricating oil circuit system as claimed in claim 1 or 2, wherein: the first oil jet (53) is an arc-shaped oil jet.

4. The ultra-high speed planetary gearbox lubricating oil circuit system as claimed in claim 3, wherein: the nozzle (52) is rotatably fitted in the circular hole (51).

5. The ultra-high speed planetary gearbox lubricating oil circuit system as claimed in claim 1, wherein: the spray head (52) is an inverted T-shaped spray head, and a plurality of second oil spray ports (53) are formed in the inverted T-shaped spray head along the height direction of the inverted T-shaped spray head.

6. The ultra-high speed planetary gearbox lubricating oil circuit system as claimed in claim 5, wherein: the second oil jet (53) is an arc-shaped oil jet.

7. The ultra-high speed planetary gearbox lubricating oil circuit system as claimed in claim 5 or 6, wherein: the spray head (52) is clamped in the round hole (51).

8. The ultra-high speed planetary gearbox lubricating oil circuit system as claimed in claim 1, wherein: it also comprises a transmission shaft (1), a first sliding bearing (2), an end cover (3), a planet carrier (4), a second rolling bearing (5), a first oil pipe (6), an inner gear ring (7), a third sliding bearing (8), a support plate (9), a gearwheel (10), a planet wheel (11), a fourth sliding bearing (12), an oil plug (13), a pinion (14), a bracket (15), a fifth sliding bearing (16), a first auxiliary support (17), a second auxiliary support (18), a middle floating shaft (19), an output shaft (20), a first oil pipe (22), a second oil pipe (23) and a plug (24),

the first sliding bearing (2) is sleeved on the transmission shaft (1), the end cover (3) is sleeved on the first sliding bearing (2), the inner gear ring (7) is sleeved on the transmission shaft (1), the planet carrier (4) is sleeved on the transmission shaft (1) and positioned on the inner side of the inner gear ring (7), the fourth sliding bearing (12) is sleeved on the transmission shaft (1), the support plate (9) is installed on the fourth sliding bearing (12), the oil plug (13) is installed at the end part of the transmission shaft (1) and positioned on the fourth sliding bearing (12), the planet wheel (11) is installed on the support plate (9), the planet gear (11) is meshed with the inner gear ring (7), the end part of the planet gear (11) is connected with the planet carrier (4) through a second rolling bearing (5), a first oil pipe (6) is installed between the end cover (3) and the supporting plate (9), and a second oil pipe (23) is installed between the planet carrier (4) and the supporting plate (9);

the large gear (10) is sleeved on the planet wheel (11), a third sliding bearing (8) is installed between the large gear (10) and the supporting plate (9), the support (15) is installed in the gear box body (50), the small gear (14) is inserted in the support (15), a fifth sliding bearing (16) is installed between the small gear (14) and the support (15), the small gear (14) is meshed with the large gear (10), a first oil pipe (22) is installed between the supporting plate (9) and the support (15),

the first auxiliary support (17) and the second auxiliary support (18) are sequentially arranged on the right side of the support (15) from left to right, the middle floating shaft (19) horizontally penetrates through the first auxiliary support (17) and the second auxiliary support (18), one end of the middle floating shaft (19) is connected with the pinion (14), and the other end of the middle floating shaft (19) is connected with an output shaft (20) located on the outer side of the gear box body (50).

9. The ultra-high speed planetary gearbox lubricating oil circuit system as defined in claim 8, wherein: the oil circuit system comprises an oil circuit of an oil inlet outside the gear box, an oil supply circuit of a supporting bearing of a large gear (10), an oil supply circuit of a supporting bearing of a planet gear (11), an oil supply circuit of a meshing of gears of parallel shafts, an oil supply circuit of a meshing of the planet gear, an oil supply circuit of a high-speed input end and 2 oil supply circuits of supporting bearings of a low-speed transmission shaft;

an oil inlet outside the gearbox is arranged on the support plate (9); lubricating oil is directly supplied to a sliding bearing (8) supporting the large gear (10) through an oil hole on the supporting plate (9); lubricating oil enters the oil hole of the planet carrier (4) from the oil hole on the supporting plate (9) through an oil pipe (23) and is supplied to the sliding bearing (5) of the planet wheel (11); lubricating oil enters a pinion oil injection pipe (21) from an oil hole in a support plate (9) and supplies the oil to the meshing part of a large gear (10) and a small gear (14); lubricating oil enters an oil pipe (23) from an oil hole in the supporting plate (9) and is supplied to the meshing part of the planet wheel (11) and the inner gear ring (7); lubricating oil enters the oil hole on the bracket (15) from the oil hole on the supporting plate (9) through an oil pipe (22), wherein one path of the lubricating oil is supplied to the fifth sliding bearing (16), and the other path of the lubricating oil is respectively supplied to a first tooth type coupling consisting of the inner teeth of the input end of the pinion (14) and the intermediate floating shaft (19) and a second tooth type coupling consisting of the inner teeth of the output shaft (20) and the intermediate floating shaft (19) through the oil hole; lubricating oil enters the oil hole in the end cover (3) from the oil hole in the supporting plate (9) through the oil pipe (6) and is supplied to the sliding bearing (2); the lubricating oil is directly supplied to the sliding bearing (12) from the oil hole on the supporting plate (9).

10. The ultra-high speed planetary gearbox lubricating oil circuit system according to claim 1 or 9, wherein: the novel gear transmission mechanism further comprises a filter screen (54), wherein the filter screen (54) is arranged above the radial through holes formed in the inner teeth at the input end of the pinion (14) and the inner teeth of the inner gear ring (7).