CN217271833U

CN217271833U - High-speed end structure of speed reducer

Info

Publication number: CN217271833U
Application number: CN202221280432.9U
Authority: CN
Inventors: 陶常彬; 曹俊; 赵婧; 孙丰虎; 魏保胜
Original assignee: Shandong Huacheng Sino German Transmission Equipment Co ltd
Current assignee: Shandong Huacheng Sino German Transmission Equipment Co ltd
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2022-08-23
Anticipated expiration: 2032-05-26

Abstract

A high-speed end structure of a speed reducer belongs to the technical field of speed reducers. Including bearing frame (3), its characterized in that: an inner bearing (2) and an outer bearing (7) are installed in a bearing seat (3), an input bevel gear shaft (1) sequentially penetrates through the inner bearing (2) and the outer bearing (7), an oil inlet is formed in the surface of the bearing seat (3), the oil inlets are communicated to the inner bearing (2) and the outer bearing (7) through respective oil ways respectively, oil return holes communicated with the inner bearing (2) and the outer bearing (7) are further formed in the bearing seat (3) respectively, and lubricating oil forms oil way circulation of the lubricating oil at the inner bearing (2) and the outer bearing (7) respectively. In the high-speed end structure of the speed reducer, oil circuit circulation formed at the outer bearing and the inner bearing respectively is utilized, flowing lubricating oil is utilized to play a sealing role, and the defects that high temperature is easily generated when sealing is carried out through an oil seal in the prior art and the sealing effect is reduced due to abrasion of the oil seal are avoided.

Description

High-speed end structure of speed reducer

Technical Field

A high-speed end structure of a speed reducer belongs to the technical field of speed reducers.

Background

The speed reducer is installed in the speed reducing transmission device between the prime mover and the working machine, and plays a role in matching the rotating speed and transmitting the torque between the prime mover and the working machine. In traditional reduction gear, generally adopt the oil blanket as the sealing member in the high-speed end (input) of reduction gear, and the high-speed end is because the rotational speed is higher, consequently, the oil blanket department at the high-speed end forms high temperature easily, cause the influence to the performance of reduction gear, wearing and tearing appear easily in oil blanket department after long-term operation simultaneously, can cause the influence to the sealing performance simultaneously, consequently, relate to one kind and can avoid producing high temperature and reduce the technical scheme that the sealed effect that causes because of wearing and tearing descends at the high-speed end of reduction gear, become the problem that needs to be solved urgently in the field.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the defects of the prior art are overcome, the oil circuit circulation formed at the outer bearing and the inner bearing respectively is utilized, the flowing lubricating oil is utilized to play a sealing role, high temperature is easily generated when sealing is carried out through an oil seal in the prior art, and the high-speed end structure of the speed reducer with reduced sealing effect caused by abrasion of the oil seal is avoided.

The utility model provides a technical scheme that its technical problem adopted is: this high-speed end structure of speed reducer, including the bearing frame, its characterized in that: the bearing seat is characterized in that an inner bearing and an outer bearing are respectively installed at two ends of the bearing seat, an input bevel gear shaft sequentially penetrates through the inner bearing and the outer bearing, an oil inlet is formed in the surface of the bearing seat, the oil inlets are communicated to the inner bearing and the outer bearing through respective oil ways respectively, oil return holes communicated with the inner bearing and the outer bearing are further formed in the bearing seat respectively, lubricating oil passes through the oil inlet and the oil return holes of the inner bearing respectively, oil way circulation of the lubricating oil is formed at the inner bearing, the lubricating oil passes through the oil inlet and the oil return holes of the outer bearing respectively, and oil way circulation of the lubricating oil is formed at the outer bearing.

Preferably, two installation bosses are respectively arranged at the inner end and the outer end of the bearing seat, the inner bearing and the outer bearing are respectively arranged on the inner boss and the outer boss, the outer end of the inner bearing is located at the port of the bearing seat, and the outer bearing is integrally located inside the bearing seat.

Preferably, the oil inlet comprises a first oil inlet and a second oil inlet, the first oil inlet radially enters the bearing seat and is butted with a port of a first oil path axially arranged in the bearing seat, and the other end of the first oil path extends to the outer bearing; the second oil inlet is in butt joint with one end of a second oil path axially arranged in the bearing seat after radially entering the bearing seat, and the other end of the second oil path extends to the inner bearing.

Preferably, a bearing seat baffle table is arranged on the inner wall of the bearing seat in a protruding manner, and the bearing seat baffle table forms two chambers which are communicated with each other at intervals of a space between the inner bearing and the outer bearing: a first internal oil chamber located outside the internal bearing and a second internal oil chamber located inside the external bearing.

Preferably, a bearing spacer bush is further arranged between the inner bearing and the outer bearing, the bearing spacer bush is sleeved on the outer ring of the input bevel gear shaft, the bearing seat baffle table is located in the middle of the bearing spacer bush, and a gap communicated with the first inner oil cavity and the second inner oil cavity is formed between the bearing seat baffle table and the outer surface of the bearing spacer bush.

Preferably, a gland is arranged at the outer end opening of an oil slinger sleeved on the outer ring of the input bevel gear shaft and arranged outside the outer bearing, the inner end of the gland axially enters the bearing seat, and a first outer oil cavity is formed between the bearing seat and the oil slinger at intervals.

Preferably, the outer side of the outer bearing is also provided with an adjusting sleeve, the adjusting sleeve is in contact with an outer ring at the outer end of the outer bearing, and the adjusting sleeve is simultaneously positioned on the outer ring of the oil slinger and forms a channel communicated with the outer bearing and the first outer oil cavity at intervals with the oil slinger.

Preferably, the outer ring of the oil retainer ring is provided with two oil retainer rings which sequentially protrude outwards from inside to outside: the oil baffle ring is arranged on the inner ring of the gland in a protruding mode, the outer oil baffle ring of the oil baffle ring is positioned on the inner side of the oil baffle ring of the inner ring of the gland and radially staggered with the side oil baffle ring positioned in the inner ring of the gland, and the oil baffle ring of the inner ring of the gland, the outer surface of the oil baffle ring and the inner surface of the pressing sleeve surround to form a second outer oil cavity positioned on the outer side of the first outer oil cavity.

Preferably, the oil return holes comprise a first oil return hole, a second oil return hole and a third oil return hole which are formed in the surface of the bearing seat, and the first oil return hole is communicated with the outer bearing from the surface of the bearing seat in the radial direction; the inner end of the second oil return hole is communicated with the first outer oil cavity, and the outer end of the second oil return hole radially penetrates through the gland and the bearing seat and then is led out from the side part of the bearing seat; and the third oil return hole axially penetrates through the gland from the outer end surface of the gland and then is communicated with the second oil return hole, and the third oil return hole radially penetrates through the pressing sleeve and is communicated with the second outer oil cavity.

Compared with the prior art, the utility model discloses the beneficial effect who has is:

in the high-speed end structure of this speed reducer, utilize the lubricating oil circulation passageway that outer bearing and inner bearing punishment formed respectively, when satisfying outer bearing and inner bearing lubrication, utilize the lubricating oil that flows to play sealed effect, produced high temperature easily when having avoided sealing through the oil blanket among the prior art to and lead to the drawback that sealed effect reduces because of the oil blanket wearing and tearing.

The inner bearing adopts an NU bearing, and the outer bearing adopts a matched tapered roller bearing. When the bearing works, the NU bearing only bears radial force and does not bear axial force, and the paired tapered roller bearing bears smaller radial force and all axial force, so that the service lives of the inner bearing and the outer bearing are greatly prolonged.

Drawings

Fig. 1 is a sectional view of a high-speed end of a vertical mill reducer.

Fig. 2 is a sectional view taken along line a-a in fig. 1.

Fig. 3 is an enlarged view of a portion a in fig. 1.

Wherein: 1. the device comprises an input bevel gear shaft 2, an inner bearing 3, a bearing seat 4, a first inner oil cavity 5, a bearing spacer 6, a second inner oil cavity 7, an outer bearing 8, a first oil way 9, a first oil inlet 10, a first outer oil cavity 11, a gland 12, a pressing sleeve 13, a stop nut 14, a second outer oil cavity 15, an oil retainer ring 16, an adjusting sleeve 17, a second oil inlet 18, a second oil way 19, a bearing seat baffle table 20, an oil baffle plate 21, a first oil return hole 22, a second oil return hole 23 and a third oil return hole.

Detailed Description

Fig. 1 to 3 are preferred embodiments of the present invention, and the present invention will be further explained with reference to fig. 1 to 3.

As shown in fig. 1-2, a high-speed end structure of a speed reducer comprises a bearing seat 3, wherein an inner cavity which is through from inside to outside is arranged inside the bearing seat 3. Two installation bosses are respectively arranged at the inner end and the outer end of the bearing seat 3, an inner bearing 2 and an outer bearing 7 are respectively assembled on the inner boss and the outer boss, wherein the outer end of the inner bearing 2 is positioned at the inner port of the bearing seat 3, and the outer bearing 7 is integrally positioned inside the bearing seat 7. The inner bearing 2 is a NU bearing common in the field, and the outer bearing 7 is a mating tapered roller bearing common in the field. When the bearing works, the NU bearing only bears radial force and does not bear axial force, and the paired tapered roller bearing bears smaller radial force and all axial force, so that the service life of the inner bearing 2 and the outer bearing 7 is greatly prolonged.

The input bevel gear shaft 1 penetrates through the inner cavity of the bearing seat 3 from inside to outside, the inner bearing 2 and the outer bearing 7 are sleeved on the outer ring of the input bevel gear shaft 1 at the same time, the outer end of the input bevel gear shaft 1 protrudes out of the outer port of the bearing seat 3 and is connected with an external prime mover (such as a driving motor), and a bevel gear at the inner end of the input bevel gear shaft 1 is meshed with a corresponding gear in the speed reducer.

A bearing spacer 5 is also arranged between the inner bearing 2 and the outer bearing 7, and the bearing spacer 5 is sleeved on the outer ring of the input bevel gear shaft 1 at the same time. A bearing seat baffle 19 is arranged on the inner wall of the bearing seat 3 in a protruding mode, and the bearing seat baffle 19 is located in the middle of the bearing spacer 5 and forms a gap with the outer surface of the bearing spacer 5. The bearing block 19 separates the space between the inner bearing 2 and the outer bearing 7 into two chambers communicating with each other: a first internal oil chamber 4 located outside the internal bearing 2 and a second internal oil chamber 6 located inside the external bearing 7.

An oil retainer ring 15 is arranged on the outer side of the outer bearing 7, the oil retainer ring 15 is sleeved on the outer ring of the input bevel gear shaft 1, the inner end of the oil retainer ring 15 is in contact with the inner ring of the outer end of the outer bearing 7, an adjusting sleeve 16 is further arranged on the outer side of the outer bearing 7, and the adjusting sleeve 16 is in contact with the outer ring of the outer end of the outer bearing 7. A gland 11 is arranged at the outer end opening of the bearing seat 3, and the inner end of the gland 11 axially enters the inside of the bearing seat 3 and is contacted with the outer end surface of the adjusting sleeve 16. The outer ring of the gland 11 is also provided with a pressing sleeve 12, the pressing sleeve 12 is sleeved on the outer ring of the input bevel gear shaft 1, the inner ring and the outer ring of the inner end of the pressing sleeve 12 are respectively clamped on the oil retainer 15 and the outer end face of the gland 11, and the pressing sleeve 12 is axially fixed through a stop gasket and a stop nut 13 which are sleeved on the outer side of the pressing sleeve 12.

After the inner end of the gland 11 enters the bearing seat 3, a first external oil cavity 10 is formed between the bearing seat 3 and the oil slinger 15 at an interval, and the adjusting sleeve 16 is simultaneously positioned on the outer ring of the oil slinger 15 and forms a channel for communicating the external bearing 7 and the first external oil cavity 10 with the oil slinger 15 at an interval.

The outer ring of the oil retainer ring 15 is provided with two oil retainer rings which sequentially protrude outwards from inside to outside: an inner oil retaining ring and an outer oil retaining ring, wherein the inner oil retaining ring is located inside the first outer oil chamber 10. An oil baffle ring is further arranged on the inner ring of the gland 11 in an inward protruding manner, and with reference to fig. 3, the outer oil baffle ring of the oil baffle ring 15 is radially staggered with the inner side of the oil baffle ring on the inner ring of the gland 11 and the side oil baffle ring on the inner ring of the gland 11. Outside the first external oil chamber 10, a second external oil chamber 14 is surrounded by an oil slinger of the inner race of the gland 11, the outer surface of the oil slinger 15, and the inner surface of the pressure sleeve 12.

The surface of the outer side of the bearing seat 3 is provided with a first oil inlet 9 in a protruding mode, the first oil inlet 9 radially enters the inner wall of the bearing seat 3 and then is in butt joint with an outer port of a first oil path 8 axially arranged in the inner wall of the bearing seat 3, the first oil path 8 axially extends to an outer ring of the outer bearing 7, and then the first oil path radially bends and extends to the outer ring of the outer bearing 7. A second oil inlet 17 symmetrical to the first oil inlet 9 is arranged on the surface of the outer side of the bearing seat 3 in a protruding mode, the second oil inlet 17 radially enters the inner wall of the bearing seat 3 and then is in butt joint with an outer port of a second oil path 18 axially arranged in the inner wall of the bearing seat 3, the second oil path 18 axially extends to the outer ring of the first inner oil chamber 4, then radially bends and extends to be communicated with the first inner oil chamber 4, and the second oil path is communicated with the inner bearing 2 through the first inner oil chamber 4.

Still seted up a plurality of oil gallery on the surface of bearing frame 3: a first oil return hole 21, a second oil return hole 22, and a third oil return hole 23. The first oil return hole 21 is communicated with the second inner oil chamber 6 from the surface of the bearing housing 3 in the radial direction; the inner end of the second oil return hole 22 is communicated with the first outer oil cavity 10, and the outer end of the second oil return hole radially penetrates through the gland 11 and the bearing seat 3 and then is led out from the side part of the bearing seat 3; the third oil return hole 23 axially penetrates through the gland 11 from the outer end face of the gland 11 and then is communicated with the second oil return hole 22, and the third oil return hole 23 simultaneously radially penetrates through the gland 11 and is communicated with the second external oil cavity 14.

The specific working process and working principle are as follows:

the input bevel gear shaft 1 is driven by an external prime mover to rotate, at the moment, lubricating oil is respectively injected through the first oil inlet 9 and the second oil inlet 17, the lubricating oil entering from the first oil inlet 9 lubricates the outer bearing 7 through the first oil path 8, and the lubricating oil entering from the second oil inlet 17 lubricates the inner bearing 2 through the second oil path 18.

An annular oil baffle plate 20 is fixed at the inner port of the bearing seat 3, the oil baffle plate 20 is used for blocking the inner bearing 2 at the inner side, part of lubricating oil is thrown to the oil baffle plate 20 when the inner bearing 2 rotates, and part of lubricating oil is blocked at the inner bearing 2 under the action of the oil baffle plate 20, so that the lubrication of the inner bearing 2 is ensured. The other part of the lubricating oil is thrown into the first inner oil chamber 4, then enters the second inner oil chamber 6 through the bearing block platform 19, and finally flows out through the first oil return hole 21 to return.

When the outer bearing 7 rotates, a part of lubricating oil is thrown into the second inner oil chamber 6, flows out through the first oil return hole 21 and returns; another part of the lubricating oil is thrown into the first outer oil chamber 10 and then flows out through the second return hole 22, and another part of the lubricating oil enters the second outer oil chamber 14 through a gap formed by the outer oil retaining ring of the inner ring of the oil retaining ring 15 and the oil retaining ring of the inner ring of the gland 11 in a staggered manner and then enters the second return hole 22 through the third return hole 23 to form return flow.

In the high-speed end structure of this speed reducer, utilize the lubricating oil circulation passageway that outer bearing 7 and inner bearing 2 punishment formed respectively, when satisfying outer bearing 7 and inner bearing 2 lubrication, utilize the lubricating oil that flows to play sealed effect, produced high temperature easily when having avoided sealing up through the oil blanket among the prior art to and lead to the drawback that sealed effect reduces because of the oil blanket wearing and tearing.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a high-speed end structure of speed reducer, includes bearing frame (3), its characterized in that: the novel bearing comprises a bearing seat (3), wherein an inner bearing (2) and an outer bearing (7) are respectively installed at two ends of the bearing seat (3), an input bevel gear shaft (1) sequentially penetrates through the inner bearing (2) and the outer bearing (7), an oil inlet is formed in the surface of the bearing seat (3), the oil inlets are communicated to the inner bearing (2) and the outer bearing (7) through respective oil ways respectively, oil return holes communicated with the inner bearing (2) and the outer bearing (7) are further formed in the bearing seat (3) respectively, lubricating oil passes through the oil inlet and the oil return holes of the inner bearing (2) respectively, oil way circulation of the lubricating oil is formed at the inner bearing (2), the lubricating oil passes through the oil inlet and the oil return holes of the outer bearing (7) respectively, and oil way circulation of the lubricating oil is formed at the outer bearing (7).

2. The high-speed end structure of a speed reducer according to claim 1, wherein: two installation bosses have been seted up respectively to the inside and outside both ends of bearing frame (3), and install respectively on inside and outside two bosses inner bearing (2) and outer bearing (7), and the outer end of inner bearing (2) is located the port department of bearing frame (3), and outer bearing (7) wholly is located the inside of bearing frame (3).

3. The high-speed end structure of a speed reducer according to claim 1, wherein: the oil inlet comprises a first oil inlet (9) and a second oil inlet (17), the first oil inlet (9) radially enters the bearing seat (3) and is in butt joint with one port of a first oil way (8) axially arranged in the bearing seat (3), and the other end of the first oil way (8) extends to the outer bearing (7); the second oil inlet (17) radially enters the bearing seat (3) and then is in butt joint with one end of a second oil path (18) axially arranged in the bearing seat (3), and the other end of the second oil path (18) extends to the inner bearing (2).

4. The high-speed end structure of a speed reducer according to claim 1, wherein: the outstanding bearing frame that is provided with on the inner wall of bearing frame (3) keeps off platform (19), and bearing frame keeps off platform (19) and forms two cavities that communicate each other with the space interval between inner bearing (2) and outer bearing (7): a first internal oil chamber (4) located outside the internal bearing (2) and a second internal oil chamber (6) located inside the external bearing (7).

5. The high-speed end structure of a speed reducer according to claim 4, wherein: a bearing spacer bush (5) is further arranged between the inner bearing (2) and the outer bearing (7), the bearing spacer bush (5) is sleeved on the outer ring of the input bevel gear shaft (1), the bearing seat baffle table (19) is located in the middle of the bearing spacer bush (5), and a gap communicated with the first inner oil cavity (4) and the second inner oil cavity (6) is formed between the outer surface of the bearing seat baffle table (19) and the outer surface of the bearing spacer bush (5).

6. The high-speed end structure of a speed reducer according to claim 1, wherein: an oil slinger (15) sleeved on the outer ring of the input bevel gear shaft (1) is arranged on the outer side of the outer bearing (7), a pressing cover (11) is arranged at the outer end opening of the bearing seat (3), the inner end of the pressing cover (11) axially enters the bearing seat (3), and a first outer oil cavity (10) is formed between the inner end of the bearing seat (3) and the oil slinger (15) at intervals.

7. The high-speed end structure of a speed reducer according to claim 6, wherein: an adjusting sleeve (16) is further arranged on the outer side of the outer bearing (7), the adjusting sleeve (16) is in contact with an outer ring of the outer end of the outer bearing (7), the adjusting sleeve (16) is located on the outer ring of the oil deflector ring (15) at the same time, and a channel for communicating the outer bearing (7) and the first outer oil cavity (10) is formed between the adjusting sleeve (16) and the oil deflector ring (15) at intervals.

8. The high-speed end structure of a speed reducer according to claim 6, wherein: the outer ring of the oil retainer ring (15) is provided with two oil retainer rings which sequentially protrude outwards from inside to outside: the oil baffle ring structure comprises an inner oil baffle ring and an outer oil baffle ring, wherein the inner ring of a gland (11) is further provided with the oil baffle ring which protrudes inwards, the outer oil baffle ring of the oil baffle ring (15) is radially staggered with the side oil baffle ring which is positioned inside the inner ring of the gland (11) and the outer oil baffle ring of the inner ring of the gland (11), the outer surface of the oil baffle ring (15) and the inner surface of a pressing sleeve (12) surround to form a second outer oil cavity (14) which is positioned outside a first outer oil cavity (10).

9. The high-speed end structure of a speed reducer according to claim 8, wherein: the oil return holes comprise a first oil return hole (21), a second oil return hole (22) and a third oil return hole (23) which are formed in the surface of the bearing seat (3), and the first oil return hole (21) is communicated with the outer bearing (7) from the surface of the bearing seat (3) in the radial direction; the inner end of the second oil return hole (22) is communicated with the first outer oil cavity (10), and the outer end of the second oil return hole radially penetrates through the gland (11) and the bearing seat (3) and then is led out from the side part of the bearing seat (3); the third oil return hole (23) axially penetrates through the gland (11) from the outer end face of the gland (11) and then is communicated with the second oil return hole (22), and the third oil return hole (23) radially penetrates through the gland (11) and is communicated with the second outer oil cavity (14).