CN115614439A

CN115614439A - Planetary speed-increasing gear box with high speed ratio and low power consumption

Info

Publication number: CN115614439A
Application number: CN202211253473.3A
Authority: CN
Inventors: 郭向飞; 王永生; 刘乐; 王墩金; 于照泰; 林峰
Original assignee: Yongneng Power Beijing Technology Co ltd
Current assignee: Yongneng Power Beijing Technology Co ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-01-17

Abstract

The invention discloses a planetary speed-increasing gearbox with high speed ratio and low power consumption, which comprises a box body structure, a high-speed shaft assembly and a planetary speed-increasing assembly, wherein the box body structure comprises a box body and a box body; one end of the high-speed shaft assembly is configured as a power output end, and the other end of the high-speed shaft assembly is provided with a sun gear; the planet speed increasing assembly and the high-speed shaft assembly are provided with a plurality of planet wheels at the transmission end, and the planet wheels are meshed with the sun wheel to drive the high-speed shaft assembly to rotate; the gearbox also includes a lube pump assembly. The planetary speed-increasing gearbox adopts a primary planetary speed-increasing speed ratio which can reach 12, and even a secondary planetary speed-increasing mode of changing a planetary gear structure can increase the speed ratio to 15-17; the mode of fixing the planet wheel shaft is adopted, so that the problem that the planet wheel rotation center is not coaxial and generates vibration in the running process of the gear box is effectively solved.

Description

Planetary speed-increasing gear box with high speed ratio and low power consumption

Technical Field

The invention relates to the technical field of energy-saving and emergency rescue equipment, in particular to a planetary speed-increasing gear box with high speed ratio and low power consumption, which is suitable for a low-power and high-rotating-speed single-stage centrifugal compressor, a vacuum fan and a centripetal turbine in the field of energy saving and emergency rescue.

Background

In the prior art, a large number of single-stage Lixin compressors, vacuum fans and centripetal turbines with low power and high rotating speed exist in the field of energy conservation and emergency rescue, and in order to obtain higher rotating speed, a speed increasing box is usually adopted to increase the rotating speed of a motor or an internal combustion engine to 10000r/min, and the highest rotating speed can reach 50000r/min. At present, a single-stage speed increasing box and a parallel shaft are generally adopted in a structural form of a speed increasing box, a sliding bearing is adopted as a bearing, the speed increasing box is large in volume and weight, the power consumption is as high as 50-150 kw, the lubricating oil quantity requirement is extremely high and basically not lower than 100L/min, and a set of independent lubricating oil station with large volume is required to be configured to ensure the stable operation of the speed increasing box.

Therefore, based on the above technical problems, those skilled in the art need to develop a novel planetary step-up gearbox with high speed ratio and low power consumption to solve the problems in the prior art.

Disclosure of Invention

The invention aims to provide a method for fixing a planet wheel shaft, which effectively solves the problem that the planet wheel rotation center is not coaxial and generates vibration in the running process of a gearbox; the planetary speed-increasing gear box with large speed ratio and low power consumption solves the problems of overlarge power consumption and the need of a huge auxiliary lubricating oil station by adopting a built-in/external gear pump and a mode of increasing an oil pool of a lower box body and oil mist lubrication.

In order to achieve the above purpose, the invention provides the following technical scheme:

the invention relates to a large-speed-ratio low-power-consumption planetary speed-increasing gearbox, which comprises:

a box structure;

the high-speed shaft assembly is integrated on one side of the box body structure; and

the planetary speed increasing assembly is integrated on the other side of the box body structure and is in transmission with the high-speed shaft assembly;

one end of the high-speed shaft assembly is configured as a power output end, and the other end of the high-speed shaft assembly is provided with a sun gear;

the planetary speed increasing assembly and the high-speed shaft assembly are provided with a plurality of planetary wheels at the transmission end, and the planetary wheels are meshed with the sun wheel to drive the high-speed shaft assembly to rotate;

the gearbox further comprises:

and the lubricating oil pump assembly is integrated in the box body structure.

Further, the box structure includes:

an upper box body and a lower box body;

the upper box body and the lower box body are assembled and fixed through bolts;

the bottom of the lower box body is formed into an oil pool which is used for storing lubricating oil;

and the outer part of the lower box body is provided with radiating fins.

Further, the power output end of the high-speed shaft assembly extends to the outer side of the box body structure;

and a planet wheel carrier is arranged in the box body structure.

Further, the planetary speed increasing assembly includes:

the low-speed shaft is configured as a power input end, one end of the box body structure, which is matched with the low-speed shaft, is a low-speed bearing seat, and the low-speed shaft is connected with the low-speed bearing seat through a cylindrical roller bearing;

the oil pump gear and the gear ring rotate synchronously with the low-speed shaft and are connected through a third bolt;

and one side of the planet wheel is meshed with the gear ring, and the other side of the planet wheel is meshed with the sun wheel.

Furthermore, the planet wheel carrier is divided into a small planet wheel carrier end close to one end of the low-speed shaft and a large planet wheel carrier end close to one end of the high-speed shaft assembly;

a planet wheel shaft is axially arranged on the planet wheel, the planet wheel shaft is connected with the small end of the planet wheel carrier and the large end of the planet wheel carrier through a fourth bolt, and a needle bearing is arranged at the joint of the planet wheel and the planet wheel shaft;

a snap ring used for limiting the axial displacement of the needle bearing is arranged at the end part of the planet wheel;

the low-speed shaft is connected with the small end of the planetary gear carrier through a deep groove ball bearing.

Further, the low-speed bearing seat is fixedly assembled with the box body structure through a second bolt;

the low-speed shaft is provided with a low-speed shaft end cover, and the low-speed shaft end cover is fixedly assembled with the low-speed bearing seat through a first bolt;

a sealing ring is arranged at the joint of the low-speed shaft end cover and the low-speed shaft;

and a shaft retainer ring for limiting the axial displacement of the cylindrical roller bearing is arranged on the outer side surface of the cylindrical roller bearing.

Further, the lubricating oil pump assembly is provided with external teeth extending to the interior of the box body structure, and the external teeth are meshed with the oil pump gear so as to drive the lubricating oil pump assembly to work through the low-speed shaft.

In the technical scheme, the planetary speed-increasing gearbox with high speed ratio and low power consumption has the following beneficial effects:

the planetary speed-increasing gearbox adopts a primary planetary speed-increasing speed ratio which can reach 12, and even a secondary planetary speed-increasing mode of changing a planetary gear structure can increase the speed ratio to 15-17; the mode of fixing the planet wheel shaft is adopted, so that the problem that vibration is generated in the running process of the gear box due to the fact that the rotation center of the planet wheel is not coaxial is effectively solved.

The planetary speed-increasing gearbox adopts the internal/external gear pump, increases the oil pool of the lower box body and adopts an oil mist lubrication mode, so that the problems of overlarge power consumption and large auxiliary lubricating oil viscosity are effectively solved; the problem that lubricating oil temperature rises in the running process of the gear box is high can be effectively solved by adopting a mode that radiating fins are arranged outside the lower box body of the gear box.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a schematic structural diagram of a planetary step-up gearbox with a high speed ratio and low power consumption, which is disclosed by the embodiment of the invention;

fig. 2 is a schematic structural view of a lower box body of a large-speed-ratio low-power-consumption planetary speed-increasing gearbox, which is disclosed by the embodiment of the invention.

Description of reference numerals:

1. a low speed shaft; 2. a seal ring; 3. a first bolt; 4. a retainer ring for a shaft; 5. a low speed shaft end cap; 6. a second bolt; 7. a low-speed bearing seat; 8. a cylindrical roller bearing; 9. a third bolt; 10. an oil pump gear; 11. a ring gear; 12. a planetary wheel shaft; 13. a small end of the planet wheel carrier; 14. a snap ring; 15. a planet wheel; 16. a deep groove ball bearing; 17. a needle bearing; 18. a large end of the planet wheel carrier; 19. a fourth bolt; 20. an upper box body; 21. a high-speed shaft assembly; 22. a lower box body; 23. a lube pump assembly; 24. and (4) radiating fins.

Detailed Description

In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.

See fig. 1-2;

the big velocity ratio low-power consumption planet speed increasing gear of this embodiment, this gear box includes:

a box structure;

a high-speed shaft assembly 21 integrated at one side of the box structure; and

a planetary speed increasing component which is integrated at the other side of the box body structure and is driven by the high-speed shaft component 21;

one end of the high-speed shaft assembly 21 is configured as a power take-off, and the other end of the high-speed shaft assembly 21 is provided with a sun gear;

the transmission end of the planetary speed increasing assembly and the high-speed shaft assembly 21 is provided with a plurality of planet wheels 15, and the planet wheels 15 are meshed with the sun wheel to drive the high-speed shaft assembly 21 to rotate;

the gearbox further comprises:

a lubricating oil pump assembly 23 integrated into the tank structure.

Specifically, the embodiment discloses a planetary speed-increasing gear box with high speed ratio and low power consumption, which is suitable for a single-stage centrifugal compressor with low power and high rotating speed, a vacuum fan and a centripetal turbine in the fields of energy conservation and emergency rescue. The planetary gearbox mainly comprises a box body structure, a high-speed shaft assembly 21 and a planetary speed-increasing assembly. The planetary speed increasing assembly is meshed with a sun gear of the high-speed shaft assembly 21 through the planetary gear 15 so as to output power to a process downstream device from a power output end of the high-speed shaft assembly 21.

Preferably, the box structure of this embodiment includes:

an upper case 20 and a lower case 22;

the upper box body 20 and the lower box body 22 are assembled and fixed through bolts;

the bottom of the lower box 22 forms an oil sump for storing lubricating oil;

the lower case 22 has heat radiating fins 24 on the outside.

The case structure of the present embodiment is divided into an upper case 20 and a lower case 22, wherein the upper case 20 is mainly used for integrating the high-speed shaft assembly 21 and the planetary speed-increasing assembly, and the bottom of the lower case 22 is used as an oil sump for storing lubricating oil therein, and the lubricating oil is delivered by a lubricating oil pump assembly 23 integrated at the bottom of the lower case 22.

Preferably, the power output end of the high-speed shaft assembly 21 of the embodiment extends to the outer side of the box body structure;

and a planet wheel carrier is arranged in the box body structure.

Preferably, the planetary speed increasing assembly of the present embodiment includes:

the low-speed shaft 1 is configured as a power input end, one end of the box body structure, which is matched with the low-speed shaft 1, is a low-speed bearing seat 7, and the low-speed shaft 1 is connected with the low-speed bearing seat 7 through a cylindrical roller bearing 8;

an oil pump gear 10 and a gear ring 11 which rotate synchronously with the low-speed shaft 1, wherein the oil pump gear 10 and the gear ring 11 are connected through a third bolt 9;

and the planet wheel 15, one side of the planet wheel 15 is meshed with the gear ring 11, and the other side of the planet wheel 15 is meshed with the sun wheel.

The planet carrier is divided into a planet carrier small end 13 close to one end of the low-speed shaft 1 and a planet carrier large end 18 close to one end of the high-speed shaft assembly 21;

a planet wheel shaft 12 is axially arranged on the planet wheel 15, the planet wheel shaft 12 is connected with a planet wheel carrier small end 13 and a planet wheel carrier large end 18 through a fourth bolt 19, and a needle bearing 17 is arranged at the joint of the planet wheel 15 and the planet wheel shaft 12;

a snap ring 14 for limiting the axial displacement of a needle bearing 17 is arranged at the end part of the planet wheel 15;

the low-speed shaft 1 is connected with the small end 13 of the planet carrier through a deep groove ball bearing 16.

The present embodiment defines the structural composition of the planetary speed increasing assembly in detail, wherein the low speed shaft 1 is a power input end, which drives the oil pump gear 10 and the gear ring 11 to rotate, meanwhile, the gear ring 11 is engaged with the planetary gear 15 to drive the planetary gear 15 to rotate, the planetary gear 15 is mounted on the planetary gear shaft 12 through the needle bearing 17, and is axially limited through the snap ring 14. The inner ring of the deep groove ball bearing 16 of the embodiment is connected with the low-speed shaft 1, and the outer ring is connected with the small end 13 of the planet carrier.

Preferably, the low-speed bearing seat 7 of the present embodiment is assembled and fixed with the box structure by the second bolt 6;

the low-speed shaft 1 is provided with a low-speed shaft end cover 5, and the low-speed shaft end cover 5 is fixedly assembled with the low-speed bearing seat 5 through a first bolt 3;

a sealing ring 2 is arranged at the joint of the low-speed shaft end cover 5 and the low-speed shaft 1; the sealing ring 2 is lip-shaped and is used for preventing lubricating oil from flowing out.

A shaft retainer ring 4 for restricting axial displacement is attached to an outer surface of the cylindrical roller bearing 8.

In addition, the above-described lubricating oil pump assembly 23 has external teeth extending to the inside of the casing structure, which are engaged with the oil pump gear 10 to drive the lubricating oil pump assembly 23 to operate through the low-speed shaft 1. The lubricating oil pump assembly 23 of the present embodiment further has an internal oil passage pipe and a nozzle, and can realize the function of oil passage circulation inside the gear box and oil mist lubrication.

the planetary speed-increasing gearbox adopts a primary planetary speed-increasing speed ratio which can reach 12, and even a secondary planetary speed-increasing mode of changing a planetary gear structure can increase the speed ratio to 15-17; the mode of fixing the planet wheel shaft 12 is adopted, so that the problem that the rotation center of the planet wheel 15 is not coaxial and generates vibration in the running process of the gearbox is effectively solved.

The planetary speed-increasing gearbox adopts a built-in/external gear pump, increases an oil pool of the lower box body 22 and an oil mist lubrication mode, and can effectively solve the problems of overlarge power consumption and large auxiliary lubricating oil viscosity; the lower gearbox body 22 of the gearbox can effectively solve the problem of high temperature of lubricating oil in the running process of the gearbox by adopting a mode of arranging the radiating fins 24 outside.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. A planetary step-up gear box with high speed ratio and low power consumption is characterized by comprising:

a box structure;

a high-speed shaft assembly (21) integrated on one side of the box structure; and

the planetary speed increasing assembly is integrated on the other side of the box body structure and is in transmission with the high-speed shaft assembly (21);

one end of the high-speed shaft assembly (21) is configured as a power output end, and the other end of the high-speed shaft assembly (21) is provided with a sun gear;

the planetary speed increasing assembly and the high-speed shaft assembly (21) are in transmission, one end of the planetary speed increasing assembly and one end of the high-speed shaft assembly (21) are provided with a plurality of planetary wheels (15), and the planetary wheels (15) are meshed with the sun wheel to drive the high-speed shaft assembly (21) to rotate;

the gearbox further comprises:

a lubricant pump assembly (23) integrated into the tank structure.

2. A high ratio, low power consumption planetary step-up gearbox according to claim 1, wherein said casing structure comprises:

an upper box body (20) and a lower box body (22);

the upper box body (20) and the lower box body (22) are assembled and fixed through bolts;

the bottom of the lower box body (22) is formed into an oil pool which is used for storing lubricating oil;

the lower box body (22) is externally provided with radiating fins (24).

3. A high speed ratio low power planetary step-up gearbox according to claim 1, wherein the power take-off of said high speed shaft assembly (21) extends outside of said case structure;

and a planet wheel carrier is arranged in the box body structure.

4. A high speed ratio, low power planetary step up gearbox as set forth in claim 3 wherein said planetary step up assembly includes:

the low-speed shaft (1), the low-speed shaft (1) is configured as a power input end, one end of the box body structure, which is matched with the low-speed shaft (1), is a low-speed bearing seat (7), and the low-speed shaft (1) and the low-speed bearing seat (7) are connected through a cylindrical roller bearing (8);

the oil pump gear (10) and the gear ring (11) rotate synchronously with the low-speed shaft (1), and the oil pump gear (10) and the gear ring (11) are connected through a third bolt (9);

the planet wheel (15), planet wheel (15) one side with ring gear (11) meshing, planet wheel (15) opposite side with the sun gear meshing.

5. A high-speed-ratio low-power-consumption planetary step-up gearbox according to claim 4, characterized in that the planetary carrier is divided into a planetary carrier small end (13) close to one end of the low-speed shaft (1) and a planetary carrier large end (18) close to one end of the high-speed shaft assembly (21);

a planet wheel shaft (12) is axially mounted on the planet wheel (15), the planet wheel shaft (12) is connected with the planet wheel carrier small end (13) and the planet wheel carrier large end (18) through a fourth bolt (19), and a needle bearing (17) is mounted at the joint of the planet wheel (15) and the planet wheel shaft (12);

a snap ring (14) used for limiting the axial displacement of the needle bearing (17) is arranged at the end part of the planet wheel (15);

the low-speed shaft (1) is connected with the small end (13) of the planet wheel carrier through a deep groove ball bearing (16).

6. A high-speed-ratio low-power-consumption planetary step-up gearbox according to claim 4, characterized in that the low-speed bearing seat (7) is fixedly assembled with the box structure through a second bolt (6);

the low-speed shaft (1) is provided with a low-speed shaft end cover (5), and the low-speed shaft end cover (5) is fixedly assembled with the low-speed bearing seat (5) through a first bolt (3);

a sealing ring (2) is arranged at the joint of the low-speed shaft end cover (5) and the low-speed shaft (1);

and a shaft retainer ring (4) for limiting the axial displacement of the cylindrical roller bearing (8) is arranged on the outer side surface of the cylindrical roller bearing.

7. A high speed ratio low power consumption planetary step-up gearbox according to claim 4, characterized in that said lube pump assembly (23) has external teeth extending to the inside of said case structure, said external teeth meshing with said oil pump gear (10) to drive said lube pump assembly (23) to operate through said low speed shaft (1).