LU503598B1

LU503598B1 - Lubricating oil circuit system for ultra-high-speed planetary gear box

Info

Publication number: LU503598B1
Application number: LU503598A
Authority: LU
Inventors: Shan Chang; Lidong Jiang; Pengyue Chen; Lijun Wang; Lin Fu
Original assignee: No 703 Res Insititute Of Cssc
Priority date: 2023-03-09
Filing date: 2023-03-09
Publication date: 2023-09-12

Abstract

Provided is a lubricating oil circuit system for an ultra-high-speed planetary gear box, which relates to a lubricating oil circuit system. The lubricating oil circuit system includes a gear box body (50), an oil circuit system, a pinion oil spraying pipe (21), and a plurality of spraying heads (52). The oil circuit system is arranged in the gear box body (50) and supplies oil. The pinion oil spraying pipe (21) is horizontally mounted on a supporting plate (9), and the pinion oil spraying pipe (21) communicates with an oil inlet in the supporting plate (9). A plurality of round holes (51) are provided in the pinion oil spraying pipe (21) in an axis direction thereof. Each round hole (51) is provided with one spraying head (52). The spraying heads (52) face a pinion in the gear box body (50).

Description

DESCRIPTION LU503598

LUBRICATING OIL CIRCUIT SYSTEM FOR ULTRA-HIGH-SPEED PLANETARY

GEAR BOX

FIELD OF THE INVENTION

The present disclosure relates to a lubricating oil circuit system, and in particular, to a lubricating oil circuit system for an ultra-high-speed planetary gear box, falling within the field of gas volume flow sensors.

BACKGROUND OF THE INVENTION

Gear transmission is an important transmission form of transmitted power, and plays an important role in the fields of automobiles, ships, aerospace and aviation. The power of a planetary gear box is coaxially output after being divided by a plurality of planetary gears. The planetary gear box has been widely used because of small size, light weight, large speed ratio, and other characteristics.

With the development of science and technology and the increase of demand for use, gear transmitted power is gradually increased, the rotation speed is gradually improved, and the design requirements for gear boxes are higher. A high-speed end speed of an ultra-high-speed planetary gear box is up to 72,000 r/min, and a linear speed is up to 180 m/s. The layout structure of a lubricating oil circuit directly affects the success or failure of the gear box, and thus is very important. The layout of the lubricating oil circuit is mainly used for the lubrication and cooling of the ultra-high-speed planetary gear box.

In the utility model patent with publication number CN201448430U, a self-powered lubricating oil circuit system for planetary gear transmission is disclosed. The utility model patent realizes lubrication by means of an oil distribution pipeline and a lubricating pipeline, and particularly lubrication and cooling of a gear by splashing lubricating oll back to a coupling through a baffle plate. Although the utility model effectively solves the lubrication and cooling of each gear inside a gear box, lubricating oil cannot be evenly and completely sprayed to the gears under the influence of factors such as a sprayin9,503598 surface and a spraying angle of an oil spraying pipe in the process of oil spraying, as well as the rotational speed of the gears and airflow in the spraying process, thereby causing partial failure of the gears, such as pitting or gluing of a tooth surface. Therefore, the problem of partial failure of gears as lubricating oil cannot be evenly and completely sprayed to the gears in an existing lubricating oil circuit system is caused.

SUMMARY OF THE INVENTION

In order to solve the problem of partial failure of gears as lubricating oil cannot be evenly and completely sprayed to the gears in an existing lubricating oil circuit system, the present disclosure further provides a lubricating oil circuit system for an ultra-high-speed planetary gear box.

The technical solution of the present disclosure is as follows. The lubricating oll circuit system for the ultra-high-speed planetary gear box includes a gear box body and an oil circuit system. The oll circuit system is arranged in the gear box body and supplies oil. The lubricating oil circuit system for the ultra-high-speed planetary gear box further includes a pinion oil spraying pipe and a plurality of spraying heads. The pinion oil spraying pipe is horizontally mounted on a supporting plate, and the pinion oil spraying pipe communicates with an oil inlet in the supporting plate. A plurality of round holes are provided in the pinion oil spraying pipe in an axis direction thereof. Each round hole is provided with one spraying head. The spraying heads face a pinion in the gear box body.

Further, the spraying heads are elliptical spraying heads each provided with a plurality of first oil spraying ports in a short axis direction thereof.

Further, the first oil spraying ports are arc-shaped oil spraying ports.

Further, the spraying heads are rotatably embedded in the round holes.

Further, the spraying heads are inverted "T"-shaped spraying heads each provided with a plurality of second oil spraying ports in a height direction thereof.

Further, the second oil spraying ports are arc-shaped oil spraying ports. LU503598

Further, the spraying heads are clamped in the round holes.

Furthermore, the lubricating oil circuit system for the ultra-high-speed planetary gear box further includes a transmission shaft, a first sliding bearing, an end cover, a planetary carrier, a second sliding bearing, a first oil pipe, an inner gear ring, a third sliding bearing, a supporting plate, a gearwheel, a planetary gear, a fourth sliding bearing, an oil plug, a pinion, a bracket, a fifth sliding bearing, a first auxiliary support, a second auxiliary support, an intermediate floating shaft, an output shaft, a second oll pipe, a third oil pipe, and a screw plug. The first sliding bearing is sheathed on the transmission shaft. The end cover is sheathed on the first sliding bearing. The inner gear ring is sheathed on the transmission shaft. The planetary carrier is sheathed on the transmission shaft and located inside the inner gear ring. The fourth sliding bearing is sheathed on the transmission shaft. The supporting plate is mounted on the fourth sliding bearing. The oil plug is mounted on an end portion of the transmission shaft and located on the fourth sliding bearing. The planetary gear is mounted on the supporting plate, and the planetary gear meshes with the inner gear ring. An end portion of the planetary gear is connected to the planetary carrier through the second sliding bearing.

The first oil pipe is mounted between the end cover and the supporting plate. The second oil pipe is mounted between the planetary carrier and the supporting plate. The gearwheel is sheathed on the planetary gear. The third sliding bearing is mounted between the gearwheel and the supporting plate. The bracket is mounted in the gear box body. The pinion is inserted in the bracket, and the fifth sliding bearing is mounted between the pinion and the bracket. The pinion meshes with the gearwheel. The first oil pipe is mounted between the supporting plate and the bracket. The first auxiliary support and the second auxiliary support are successively mounted on the right side of the bracket from left to right. The intermediate floating shaft horizontally penetrates in the first auxiliary support and the second auxiliary support. One end of the intermediate floating shaft is connected to the pinion, and the other end of the intermediate floating shaft is connected to the output shaft located outside the gear box body.

Further, the oil circuit system includes an oil circuit from an external oil inlet of a gear box, an oil supply circuit from a supporting bearing of the gearwheel, an oil supply circuit from a supporting bearing of the planetary gear, an oil supply circuit from a parallel-axes,5 03598 gear meshing part, an oil supply circuit from a planetary gear meshing part, an oil supply circuit from a high-speed-stage input end, and an oil supply circuit from two supporting bearings of a low-speed-stage transmission shaft. The external oil inlet of the gear box is located in the supporting plate. Lubricating oil is directly supplied to the sliding bearing supporting the gearwheel through an oil hole in the supporting plate. The lubricating oll enters an oil hole of the planetary carrier from the oil hole in the supporting plate through the oil pipe, and is supplied to the sliding bearing of the planetary gear. The lubricating oil enters the pinion oil spraying pipe from the oil hole in the supporting plate, and is supplied to a meshing position of the gearwheel and the pinion. The lubricating oil enters the oil pipe from the oil hole in the supporting plate, and is supplied to a meshing position of the planetary gear and the inner gear ring. The lubricating oil enters an oil hole in the bracket from the oil hole in the supporting plate through the oil pipe, is partially supplied to the fifth sliding bearing, and is partially supplied, through oil holes, to a first toothed coupling composed of internal teeth of an input end of the pinion and the intermediate floating shaft and a second toothed coupling composed of internal teeth of the output shaft and the intermediate floating shaft respectively. The lubricating oil enters an oil hole in the end cover from the oil hole in the supporting plate through the oil pipe, and is supplied to the sliding bearing. The lubricating oil is directly supplied to the sliding bearing from the oil hole in the supporting plate.

Furthermore, the lubricating oil circuit system for the ultra-high-speed planetary gear box further includes a filter screen. The filter screen is mounted above the internal teeth of the input end of the pinion and internal teeth of the inner gear ring provided with radial through holes.

The present disclosure has the following improved effects compared to the related art. 1. The lubricating oil circuit system for the ultra-high-speed planetary gear box according to the present disclosure is simple in layout structure, elaborate in design, easy to assemble and disassemble, and good in maintainability and accessibility. 2. The layout structure of the lubricating oil circuit system for the ultra-high-speed planetary gear box according to the present disclosure is applicable to occasions whef&,593598 high transmission speed that is up to 72,000 r/min is required, and the range of application is wide. 3. The layout structure of the lubricating oil circuit system for the ultra-high-speed planetary gear box according to the present disclosure makes full use of internal structures of parts, is elaborate in design, and reduces the space and weight of the gear box. 4. In the present disclosure, the pinion oil spraying pipe output at a high speed is particularly designed. The pinion oil spraying pipe is provided with the plurality of spraying heads. Each spraying head is provided with arc-shaped oil spraying ports, whereby the spraying head generates a rotational spraying force in the spraying process.

The magnitude of the spraying force is achieved by adjusting the inlet pressure of lubricating oil. When the pinion turns to mesh with the gearwheel, the lubricating oil sprayed by the spraying heads is rapidly stirred into the meshing position between the gearwheel and the pinion under the action of airflow and inertial force, thereby ensuring the lubrication and cooling effects between the gears. 5. In the present disclosure, the spraying heads are arranged in the length direction of the pinion oil pipe. Therefore, it can be ensured that there is no dead zone in the axial direction of the pinion, and lubrication and cooling of all the gears is achieved, thereby reducing and avoiding the problem of partial failure of the gears.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of an overall structure according to the present disclosure; Fig. 2 is a schematic diagram of a pinion oil pipe with elliptical spraying heads;

Fig. 3 is a schematic diagram of an elliptical spraying head; Fig. 4 is a schematic diagram of a pinion oil pipe with inverted "T"-shaped spraying heads; Fig. 5 is a schematic diagram of an inverted "T"-shaped spraying head; and Fig. 6 is a schematic diagram of a filter screen 54.

DETAILED DESCRIPTION OF THE EMBODIMENTS LU503598

Specific Embodiment 1: This embodiment is illustrated with reference to Fig. 1 to Fig. 5. A lubricating oil circuit system for an ultra-high-speed planetary gear box according to this embodiment includes a gear box body 50 and an oil circuit system. The oil circuit system is arranged in the gear box body 50 and supplies oil. The lubricating oil circuit system for the ultra-high-speed planetary gear box further includes a pinion oil spraying pipe 21 and a plurality of spraying heads 52. The pinion oil spraying pipe 21 is horizontally mounted on a supporting plate 9, and the pinion oil spraying pipe 21 communicates with an oil inlet in the supporting plate 9. À plurality of round holes 51 are provided in the pinion oil spraying pipe 21 in an axis direction thereof. Each round hole 51 is provided with one spraying head 52. The spraying heads 52 face a pinion in the gear box body 50.

The layout structure of the lubricating oil circuit system for the ultra-high-speed planetary gear box according to this embodiment is used for lubricating and cooling the ultra-high-speed planetary gear box. The layout structure is simple and direct, makes full use of internal structures of parts, is elaborate in design, and reduces the space and weight of the gear box. Therefore, on the basis of ensuring full lubrication and cooling, the gear box is more compact in structure and lighter in weight.

Particularly, the pinion oil spraying pipe is designed with the spraying heads according to this embodiment, thereby improving the lubrication and cooling effects of the gear box.

Specific Embodiment 2: This embodiment is illustrated with reference to Fig. 2 to Fig. 3. The spraying heads 52 according to this embodiment are elliptical spraying heads each provided with a plurality of first oil spraying ports 53 in a short axis direction thereof.

In this way, the elliptical spraying heads can be rotated in a horizontal direction by the combined action of the oil pressure and the nozzle shape, thereby ensuring the divergence of the sprayed lubricating oil. Other components and connection relationships are the same as those in Specific Embodiment 1.

Specific Embodiment 3: This embodiment is illustrated with reference to Fig. 2 {9,503598

Fig. 3. The first oil spraying ports 53 according to this embodiment are arc-shaped oil spraying ports. In this way, the arc-shaped oil spraying ports can change the direction in which the lubricating oil is sprayed out. Other components and connection relationships are the same as those in Specific Embodiment 1 or 2.

Specific Embodiment 4: This embodiment is illustrated with reference to Fig. 2 to

Fig. 3. The spraying heads 52 according to this embodiment are rotatably embedded in the round holes 51. In this way, the radiation surface of the lubricating oil sprayed by the spraying heads can be increased. Other components and connection relationships are the same as those in Specific Embodiment 1, 2 or 3.

Specific Embodiment 5: This embodiment is illustrated with reference to Fig. 4 and

Fig. 5. The spraying heads 52 according to this embodiment are inverted "T"-shaped spraying heads each provided with a plurality of second oil spraying ports 53 in a height direction thereof. In this way, horizontal sections of the spraying heads can be firmly clamped in the pinion oil pipe without damage due to the change of oil pressure. Other components and connection relationships are the same as those in Specific

Embodiment 1, 2, 3, or 4.

Specific Embodiment 6: This embodiment is illustrated with reference to Fig. 5. The second oil spraying ports 53 according to this embodiment are arc-shaped oil spraying ports. In this way, a larger radiation surface of the sprayed lubricating oil can be ensured.

Other components and connection relationships are the same as those in Specific

Embodiment 1, 2, 3, 4, or 5.

Specific Embodiment 7: This embodiment is illustrated with reference to Fig. 4. The spraying heads 52 according to this embodiment are clamped in the round holes 51. In this way, the strength of the oil pipe can be ensured, and the spraying heads can be mounted more firmly. Other components and connection relationships are the same as any one of those in Specific Embodiments 1 to 6.

Specific Embodiment 8: This embodiment is illustrated with reference to Fig. 1. The lubricating oil circuit system for the ultra-high-speed planetary gear box according to this embodiment further includes a transmission shaft 1, a first sliding bearing 2, an endj503598 cover 3, a planetary carrier 4, a second sliding bearing 5, a first oil pipe 6, an inner gear ring 7, a third sliding bearing 8, a supporting plate 9, a gearwheel 10, a planetary gear 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, an intermediate floating shaft 19, an output shaft 20, a second oil pipe 22, a third oil pipe 23, and a screw plug 24.

The first sliding bearing 2 is sheathed on the transmission shaft 1. The end cover 3 is sheathed on the first sliding bearing 2. The inner gear ring 7 is sheathed on the transmission shaft 1. The planetary carrier 4 is sheathed on the transmission shaft 1 and located inside the inner gear ring 7. The fourth sliding bearing 12 is sheathed on the transmission shaft 1. The supporting plate 9 is mounted on the fourth sliding bearing 12.

The oil plug 13 is mounted on an end portion of the transmission shaft 1 and located on the fourth sliding bearing 12. The planetary gear 11 is mounted on the supporting plate 9, and the planetary gear 11 meshes with the inner gear ring 7. An end portion of the planetary gear 11 is connected to the planetary carrier 4 through the second sliding bearing 5. The first oil pipe 6 is mounted between the end cover 3 and the supporting plate 9. The third oil pipe 23 is mounted between the planetary carrier 4 and the supporting plate 9. The gearwheel 10 is sheathed on the planetary gear 11. The third sliding bearing 8 is mounted between the gearwheel 10 and the supporting plate 9. The bracket 15 is mounted in the gear box body 50. The pinion 14 is inserted in the bracket 15, and the fifth sliding bearing 16 is mounted between the pinion 14 and the bracket 15.

The pinion 14 meshes with the gearwheel 10. The second oil pipe 22 is mounted between the supporting plate 9 and the bracket 15. The first auxiliary support 17 and the second auxiliary support 18 are successively mounted on the right side of the bracket 15 from left to right. The intermediate floating shaft 19 horizontally penetrates in the first auxiliary support 17 and the second auxiliary support 18. One end of the intermediate floating shaft 19 is connected to the pinion 14, and the other end of the intermediate floating shaft 19 is connected to the output shaft 20 located outside the gear box body 50.

Other components and connection relationships are the same as any one of those in

Specific Embodiments 1 to 7.

Specific Embodiment 9: This embodiment is illustrated with reference to Fig. 1. The oil circuit system according to this embodiment includes an oil circuit from an external oil inlet of a gear box, an oil supply circuit from a supporting bearing of the gearwheel 10, an oil supply circuit from a supporting bearing of the planetary gear 11, an oil supply circyit,503598 from a parallel-axes gear meshing part, an oil supply circuit from a planetary gear meshing part, an oil supply circuit from a high-speed-stage input end, and an oil supply circuit from two supporting bearings of a low-speed-stage transmission shaft.

The external oil inlet of the gear box is located in the supporting plate 9. Lubricating oil is directly supplied to the sliding bearing 8 supporting the gearwheel 10 through an oil hole in the supporting plate 9. The lubricating oil enters an oil hole of the planetary carrier 4 from the oil hole in the supporting plate 9 through the third oil pipe 23, and is supplied to the second sliding bearing 5 of the planetary gear 11. The lubricating oil enters the pinion oil spraying pipe 21 from the oil hole in the supporting plate 9, and is supplied to a meshing position of the gearwheel 10 and the pinion 14. The lubricating oil enters the third oil pipe 23 from the oil hole in the supporting plate 9, and is supplied to a meshing position of the planetary gear 11 and the inner gear ring 7. The lubricating oil enters an oil hole in the bracket 15 from the oil hole in the supporting plate 9 through the oil pipe 22, is partially supplied to the fifth sliding bearing 16, and is partially supplied, through oil holes, to a first toothed coupling composed of internal teeth of an input end of the pinion 14 and the intermediate floating shaft 19 and a second toothed coupling composed of internal teeth of the output shaft 20 and the intermediate floating shaft 19 respectively.

The lubricating oil enters an oil hole in the end cover 3 from the oil hole in the supporting plate 9 through the first oil pipe 6, and is supplied to the first sliding bearing 2. The lubricating oil is directly supplied to the fourth sliding bearing 12 from the oil hole in the supporting plate 9. In this way, the layout structure is simple and direct, makes full use of internal structures of parts, is elaborate in design, and reduces the space and weight of the gear box. Therefore, on the basis of ensuring full lubrication and cooling, the gear box is more compact in structure and lighter in weight. Other components and connection relationships are the same as any one of those in Specific Embodiments 1 to 8.

Specific Embodiment 10: This embodiment is illustrated with reference to Fig. 6. The lubricating oil circuit system for the ultra-high-speed planetary gear box according to this embodiment further includes a filter screen 54. The filter screen 54 is mounted above the internal teeth of the input end of the pinion 14 and internal teeth of the inner gear ring 7 provided with radial through holes. In this way, the lubricating oil in the whole gear box is preliminarily filtered by the filter screen, and the filter screen is also taken out angjsgssgg cleaned to prevent an oil outlet from being blocked during maintenance. The internal teeth of the input end of the pinion and the internal teeth of the inner gear ring are provided with the radial through holes for throwing the lubricating oil into the box body to flow out by means of centrifugal force.

The filter screen 54 according to this embodiment includes a support frame body 54-1, a screen body 54-2, and a shielding fence 54-3. The screen body 54-2 is mounted on the support frame body 54-1. The shielding fence 54-3 is mounted around the screen body 54-2, and the cross-sectional shape of the shielding fence 54-3 is triangular so as to receive and filter the lubricating oil.

The working principle of the present disclosure will be described with reference to

Fig. 1 to Fig. 6.

In practical use of the lubricating oil circuit system for the ultra-high-speed planetary gear box, an external mechanical pump is required to pump out oil. The specific principle is the related art, and will not be described in detail herein. The external oil inlet of the gear box is located in the supporting plate, and mainly supplies oil to five parts: gear meshing parts, sliding bearings and the like, including a supporting bearing of a planetary gear and gearwheel assembly, a parallel-axes gear meshing part, a planetary gear meshing part, a high-speed-stage input end, and supporting bearings of a low-speed-stage transmission shaft.

Oil supply from supporting bearing of gearwheel: The lubricating oil is directly supplied to the sliding bearing supporting the gearwheel through an oil hole in the supporting plate.

Oil supply from supporting bearing of planetary gear: The lubricating oil enters an oil hole of the planetary carrier from the oil hole in the supporting plate through the oil pipe, and is supplied to the sliding bearing of the planetary gear.

Oil supply from parallel-axes gear meshing part: The lubricating oil enters the oil pipe from the oil hole in the supporting plate, and is supplied to a meshing position of the gearwheel and the pinion. LU503598

Oil supply from planetary gear meshing part: The lubricating oil enters the oil pipe from the oil hole in the supporting plate, and is supplied to a meshing position of the planetary gear and the inner gear ring.

Oil supply from high-speed-stage input end: The lubricating oil enters an oil hole in the bracket from the oil hole in the supporting plate through the oil pipe, is partially supplied to the sliding bearing, and is partially supplied, through oil holes, to a toothed coupling 1 composed of internal teeth of an input end of the pinion and the intermediate floating shaft and a toothed coupling 2 composed of internal teeth of the transmission shaft and the intermediate floating shaft respectively.

Oil supply from two supporting bearings of low-speed-stage transmission shaft: The lubricating oil enters an oil hole in the end cover from the oil hole in the supporting plate through the oil pipe, and is supplied to a sliding bearing. The lubricating oil is directly supplied to another sliding bearing from the oil hole in the supporting plate.

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

The above examples are merely illustrative of the technical solutions of the present disclosure and are not restrictive thereto. Although the present disclosure has been described in detail with reference to the aforementioned examples, those of ordinary skill in the art will appreciate that the technical solutions disclosed in the aforementioned examples may still be modified, or some of the technical features thereof may be substituted equivalently. Such modifications or substitutions do not depart the corresponding technical solutions from the spirit and scope of the technical solutions in the various examples of the present disclosure in nature.

Claims

CLAIMS LU503598

1. Alubricating oil circuit system for an ultra-high-speed planetary gear box, comprising a gear box body (50), characterized by further comprising a transmission shaft (1), a first sliding bearing (2), an end cover (3), a planetary carrier (4), a second sliding bearing (5), a first oil pipe (6), an inner gear ring (7), a third sliding bearing (8), a supporting plate (9), a gearwheel (10), a planetary gear (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), an intermediate floating shaft (19), an output shaft (20), a second oil pipe (22), a third oil pipe (23), a screw plug (24), an oll circuit system, a pinion oil spraying pipe (21), and a plurality of spraying 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 mounted on the supporting plate (9), and the pinion oil spraying pipe (21) communicates with an oil inlet in the supporting plate (9); a plurality of round holes (51) are provided in the pinion oil spraying pipe (21) in an axis direction thereof, each round hole (51) is provided with one spraying head (52), and the spraying heads (52) face a pinion in the gear box body (50); the first sliding bearing (2) is sheathed on the transmission shaft (1), the end cover (3) is sheathed on the first sliding bearing (2), the inner gear ring (7) is sheathed on the transmission shaft (1), the planetary carrier (4) is sheathed on the transmission shaft (1) and located inside the inner gear ring (7), the fourth sliding bearing (12) is sheathed on the transmission shaft (1), the supporting plate (9) is mounted on the fourth sliding bearing (12), the oil plug (13) is mounted on an end portion of the transmission shaft (1) and located on the fourth sliding bearing (12), the planetary gear (11) is mounted on the supporting plate (9), the planetary gear (11) meshes with the inner gear ring (7), an end portion of the planetary gear (11) is connected to the planetary carrier (4) through the second sliding bearing (5), the first oil pipe (6) is mounted between the end cover (3) and the supporting plate (9), and the third oil pipe (23) is mounted between the planetary carrier (4) and the supporting plate (9); the gearwheel (10) is sheathed on the planetary gear (11), the third sliding bearing (8) is mounted between the gearwheel (10) and the supporting plate (9), the bracket (15) is mounted in the gear box body (50), the pinion (14) is inserted in the bracket (15), the fifth sliding bearing (16) is mounted between the pinion (14) and the bracket (15), the pinion (14) meshes with the gearwheel (10), and the second oil pipe (22) is mounted between the supporting plate (9) and the bracket (15); LU503598 the first auxiliary support (17) and the second auxiliary support (18) are successively mounted on the right side of the bracket (15) from left to right, the intermediate floating shaft (19) horizontally penetrates in the first auxiliary support (17) and the second auxiliary support (18), one end of the intermediate floating shaft (19) is connected to the pinion (14), and the other end of the intermediate floating shaft (19) is connected to the output shaft (20) located outside the gear box body (50);

the oll circuit system comprises an oil circuit from an external oil inlet of a gear box, an oil supply circuit from a supporting bearing of the gearwheel (10), an oil supply circuit from a supporting bearing of the planetary gear (11), an oil supply circuit from a parallel-axes gear meshing part, an oil supply circuit from a planetary gear meshing part, an oil supply circuit from a high-speed-stage input end, and an oil supply circuit from two supporting bearings of a low-speed-stage transmission shaft;

the external oil inlet of the gear box is located in the supporting plate (9); lubricating oil is directly supplied to the third sliding bearing (8) supporting the gearwheel (10) through an oil hole in the supporting plate (9); the lubricating oil enters an oil hole of the planetary carrier (4) from the oil hole in the supporting plate (9) through the third oil pipe (23), and is supplied to the second sliding bearing (5) of the planetary gear (11); the lubricating oil enters the pinion oil spraying pipe (21) from the oil hole in the supporting plate (9), and is supplied to a meshing position of the gearwheel (10) and the pinion (14); the lubricating oil enters the third oil pipe (23) from the oil hole in the supporting plate (9), and is supplied to a meshing position of the planetary gear (11) and the inner gear ring (7); the lubricating oil enters an oil hole in the bracket (15) from the oil hole in the supporting plate (9) through the second oil pipe (22), is partially supplied to the fifth sliding bearing (16), and is partially supplied, through oil holes, to a first toothed coupling composed of internal teeth of an input end of the pinion (14) and the intermediate floating shaft (19) and a second toothed coupling composed of internal teeth of the output shaft (20) and the intermediate floating shaft (19) respectively; the lubricating oil enters an oil hole in the end cover (3) from the oil hole in the supporting plate (9) through the first oil pipe (6), and is supplied to the first sliding bearing (2); and the lubricating oil is directly supplied to the fourth sliding bearing (12) from the oil hole in the supporting plate (9).

2. The lubricating oil circuit system for the ultra-high-speed planetary gear bQx,503598 according to claim 1, characterized in that the spraying heads (52) are elliptical spraying heads each provided with a plurality of first oil spraying ports (53) in a short axis direction thereof.

3. The lubricating oil circuit system for the ultra-high-speed planetary gear box according to claim 2, characterized in that the first oil spraying ports (53) are arc-shaped oil spraying ports.

4. The lubricating oil circuit system for the ultra-high-speed planetary gear box according to claim 3, characterized in that the spraying heads (52) are rotatably embedded in the round holes (51).

5. The lubricating oil circuit system for the ultra-high-speed planetary gear box according to claim 1, characterized in that the spraying heads (52) are inverted "T"-shaped spraying heads each provided with a plurality of second oil spraying ports (53) in a height direction thereof.

6. The lubricating oil circuit system for the ultra-high-speed planetary gear box according to claim 5, characterized in that the second oil spraying ports (53) are arc-shaped oil spraying ports.

7. The lubricating oil circuit system for the ultra-high-speed planetary gear box according to claim 5 or 6, characterized in that the spraying heads (52) are clamped in the round holes (51).

8. The lubricating oil circuit system for the ultra-high-speed planetary gear box according to claim 7, characterized by further comprising a filter screen (54), wherein the filter screen (54) is mounted above the internal teeth of the input end of the pinion (14) and internal teeth of the inner gear ring (7) provided with radial through holes.