CN114198392A

CN114198392A - Axially fixed and radially inclinable combined bearing

Info

Publication number: CN114198392A
Application number: CN202111516332.1A
Authority: CN
Inventors: 周宏亮; 王晓红; 杨龙; 张博晗; 汤鱼
Original assignee: 703th Research Institute of CSIC
Current assignee: 703th Research Institute of CSIC
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-03-18
Anticipated expiration: 2041-12-09
Also published as: CN114198392B

Abstract

The invention belongs to the technical field of bearings, and particularly relates to an axially fixed and radially tiltable combined bearing. The invention comprises a bearing shell, a tilting pad, a bearing oil seal and bearing alloy, wherein the bearing adopts a tilting pad structure in the radial direction, a stepped flange structure with a boss extending towards the outer direction is processed on the end surface of the bearing oil seal, and babbitt metal is cast on the end surface of the boss to be used as a thrust surface matched with a thrust disc. The invention can effectively reduce the axial length of the bearing and bear certain axial force under the condition of limited axial space in the gear box, thereby ensuring the reliable operation of the gear box. In order to replace an axial tilting pad structure with large occupied space, a bearing oil seal structure with the end surfaces being prolonged and grooves being uniformly distributed is designed, the installation and operation adaptability is improved, and the same bearing requirement is met by a smaller structural size.

Description

Axially fixed and radially inclinable combined bearing

Technical Field

The invention belongs to the technical field of bearings, and particularly relates to an axially fixed and radially tiltable combined bearing.

Background

The tilting pad bearing is suitable for various gear boxes due to the advantages of good stability and strong centering adaptability, the radial bearing of the gear box under multiple working conditions is complex in loading condition, one bearing usually bears loads in multiple dispersed directions, the radial tilting pad bearing with strong adaptability is still a good choice even in the situation of low rotating speed at the moment, the existing axial tilting pad structure is complex, the installation is not easy, the time cost and the economic cost of production and processing are high, the axial tilting pad structure occupies a relatively large volume compared with the whole bearing structure, the axial structural size of the bearing can be obviously increased, for the gear boxes with certain specific purposes, the axial force is relatively limited, and certain performance redundancy can exist by adopting the axial tilting pad structure. Therefore, in the situation that the axial load of the gearbox is limited and the axial dimension is limited, axial selection of the tilting pad bearing structure is needless to say, and a simple thrust structure can be used for replacement. The axial-fixed radial tilting combined bearing structure can effectively reduce the axial structure size of the tilting pad bearing and reduce the production and processing cost of the tilting pad bearing.

Disclosure of Invention

The invention aims to provide an axially fixed and radially tiltable combined bearing which can effectively reduce the axial length of a bearing and bear a certain axial force at the same time under the condition that the axial space in a gear box is limited, and ensure the reliable operation of the gear box.

The purpose of the invention is realized as follows:

the utility model provides an axial fixed radial tilting combination bearing, includes bearing housing 1, tilting pad 2, bearing oil blanket 3, bearing alloy 4, and the bearing adopts tilting pad structure radially, and the stepped flange structure of 5 outside normal direction extensions of bearing oil blanket terminal surface processing bosss casts babbit alloy on the boss terminal surface, as with thrust surface of thrust disc complex.

Casting babbit alloy on the end face of the bearing oil seal, and processing grooves and inclined wedges which extend along the radial direction and are uniformly distributed along the circumferential direction on the end face.

The inner surface of the bearing seal oil is also cast with babbitt metal.

The invention has the beneficial effects that: the invention can effectively reduce the axial length of the bearing and bear certain axial force under the condition of limited axial space in the gear box, thereby ensuring the reliable operation of the gear box. In order to replace an axial tilting pad structure with large occupied space, a bearing oil seal structure with the end surfaces being prolonged and grooves being uniformly distributed is designed, the installation and operation adaptability is improved, and the same bearing requirement is met by a smaller structural size. The axial fixed radial tilting combined bearing is simple in structure, reasonable optimization of an oil seal structure can meet actual use requirements, the structural size of the tilting pad bearing under specific use requirements is reduced, and a new direction is provided for reducing the structural weight.

Drawings

FIG. 1 is a structural view of an axially fixed and radially tiltable combined bearing;

fig. 2 is a structural view of an end face of a bearing oil seal.

Detailed Description

The invention is further described with reference to the accompanying drawings.

The radial tilting combined bearing is axially fixed, the bearing adopts a traditional tilting pad structure in the radial direction, the end face of a bearing oil seal is not parallel and level any more, but is designed into a stepped flange structure with a boss extending towards the outer direction, and babbit alloy is cast on the end face of the boss to serve as a thrust face matched with the thrust disc. As a thrust structure matched with the thrust disc, the axial force bearing and axial positioning functions are realized, and the axial tilting pad structure is replaced by the design, so that the axial structure size of the bearing is reduced, the structural complexity is reduced, and the method is simple and effective and can reduce the production cost. The bearing structure only needs to be properly improved on the bearing oil seal of the common radial tilting pad. The babbit alloy is cast on the end face of the whole bearing oil seal, and grooves and wedges which extend along the radial direction and are distributed uniformly in the circumferential direction are processed on the end face, so that the bearing oil seal is beneficial to lubricating and bearing axial thrust, and meanwhile, the bearing oil seal needs less oil supply amount than a tilting pad thrust bearing. The radial tilting pad is combined with the fixed axial thrust surface, babbitt alloy is cast on the inner surface of the bearing oil seal, and the size of the babbitt alloy is slightly larger than that of the radial tilting pad, so that a certain oil sealing effect is achieved, and radial bearing is not influenced.

The invention belongs to a novel liquid tilting pad dynamic pressure sliding combined bearing, which can effectively reduce the axial length of the bearing and simultaneously bear certain axial force under the condition of limited axial space in a gear box, thereby ensuring the reliable operation of the gear box. In order to replace an axial tilting pad structure with large occupied space, a bearing oil seal structure with the end surfaces being prolonged and grooves being uniformly distributed is designed, the installation and operation adaptability is improved, and the same bearing requirement is met by a smaller structural size. The axial fixed radial tilting combined bearing is simple in structure, reasonable optimization of an oil seal structure can meet actual use requirements, the structural size of the tilting pad bearing under specific use requirements is reduced, and a new direction is provided for reducing the structural weight.

Example 1

The invention changes the structure of the tilting pad bearing to meet the requirement of the tilting pad bearing on the performance under the condition of reducing the size of the axial structure. The invention comprises a bearing shell, a tilting pad, a bearing oil seal and the like. The bearing structure can effectively utilize the bearing oil seal space structure, thereby reducing the installation space of the bearing inside the gear box, being beneficial to the application of the tilting pad bearing under the condition of limiting the axial space of the gear box, and being simultaneously suitable for reducing the production and processing cost and meeting the requirements of structure light weight design. The oil seal end face of the bearing with the axially fixed and radially inclinable combined structure is not retracted inwards or is flush with a bearing shell, but is designed into a stepped flange structure with a boss extending towards the outer direction in the end face, and a layer of bearing alloy is directly cast on the end face to serve as an axial thrust face, so that the purposes of reducing the size of the axial structure and the complexity of the bearing structure of the bearing are achieved. Meanwhile, through detailed designs such as grooves and wedges uniformly distributed on the end face of the bearing oil seal, the axial bearing capacity is improved.

Due to special application occasions and structural characteristics of the tilting pad bearing, the axial tilting pad structure of the bearing is complex, the axial mounting structure size is large, and when the requirement on the axial size of the gear box is small, the axial tilting pad mounting of the bearing is limited. The above problems can therefore be solved by the present axially fixed radially tiltable compound bearing structural design.

The axial fixed radial tilting combined bearing structure is arranged on a gear box, an axial tilting pad structure is omitted in order to reduce the size of the axial structure, and the end face of a bearing oil seal is designed and processed into a boss structure, so that the axial force and the axial positioning which are the same as those of an axial tilting pad are realized, and the axial fixed radial tilting combined bearing structure is shown in figure 1. The specific structure of the end face of the bearing oil seal is as shown in fig. 2, and grooves and wedges which are uniformly distributed in the circumferential direction and extend in the radial direction are machined on the end face of the bearing oil seal, so that the adaptability of the operation and installation of the bearing is improved, and the end face lubrication and axial bearing capacity are improved. When the thrust disc is in work, the end face of the bearing oil seal directly forms a thrust oil wedge with the thrust disc, and a layer of Babbitt alloy with relatively soft hardness is cast on the end face to protect the thrust disc. The babbitt metal is also cast on the inner surface of the bearing oil seal, so that the purposes of sealing oil and protecting a shaft neck are achieved, and the purposes of radial oil seal and axial bearing of the bearing oil seal are achieved.

Claims

1. The utility model provides an axial fixed radial tilting combination bearing, includes bearing housing (1), tilting pad (2), bearing oil blanket (3), bearing alloy (4), its characterized in that: the radial direction of the bearing adopts a tilting pad structure, a stepped flange structure with a boss (5) extending towards the outer direction is processed on the end face of the bearing oil seal, and babbit alloy is cast on the end face of the boss to be used as a thrust face matched with the thrust disc.

2. The axially fixed radially tiltable compound bearing of claim 1, wherein: casting babbit alloy on the end face of the bearing oil seal, and processing grooves and inclined wedges which extend along the radial direction and are uniformly distributed along the circumferential direction on the end face.

3. The axially fixed radially tiltable compound bearing of claim 1, wherein: the inner surface of the bearing seal oil is also cast with babbitt metal.