CN215171597U

CN215171597U - Lubricating and sealing structure of intermediary bearing

Info

Publication number: CN215171597U
Application number: CN202120763845.1U
Authority: CN
Inventors: 张旭阳; 张鲲羽; 李一兴; 李少军
Original assignee: 704th Research Institute of CSIC
Current assignee: 704th Research Institute of CSIC
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-12-14
Anticipated expiration: 2031-04-14

Abstract

The utility model relates to a lubrication and seal structure of intermediary bearing, including intermediary bearing, interior axle, outer axle and collection oil cavity, the outer loop and the outer fixed connection of axle of intermediary bearing, the inner ring and interior fixed connection of intermediary bearing, set up vacuum trap spiral seal structure between the interior axle of intermediary bearing front side and the outer axle, the inlet port in the vacuum trap spiral seal structure intercommunication, intermediary bearing rear side is equipped with shelves oilboard, be equipped with the aperture on the shelves oilboard, be equipped with the oilhole that unloads of intercommunication collection oil cavity on the outer epaxial hole of intermediary bearing rear side. The use of this structure can improve the lubrication problem that current intermediary's bearing met in using to reduce the use amount of lubricating oil. The concentric shaft structure has wider application prospect.

Description

Lubricating and sealing structure of intermediary bearing

Technical Field

The utility model relates to a lubricating structure of intermediary's bearing, especially a lubricating structure of intermediary's bearing high integration.

Background

The intermediate bearing is a commonly used support structure in concentric shaft structures. The inner ring and the outer ring of the intermediate bearing rotate along with the inner shaft and the outer shaft respectively. The existence of the intermediate bearing greatly increases the shafting stability of the concentric shaft structure, and is an indispensable component in the use of the concentric shaft structure.

Because the bearing seat of the intermediate bearing rotates along with the high-speed rotor, the lubricating oil pipeline cannot be directly connected with the lubricating oil nozzle. Therefore, in the separated lubrication structure, which is frequently used in the intermediate bearing at present, as shown in fig. 1, when in use, a certain part of fuel oil splashes out from a gap between the lubricating oil pipeline and the lubricating oil nozzle and directly flows into the oil discharge chamber, which causes waste of the use of the lubricating oil.

In addition, the intermediate bearing mostly adopts a multi-piston ring sealing structure to prevent the lubricating oil from leaking and reduce the consumption of the lubricating oil. One kind of piston ring sealed contact type sealing device. However, when the rotating speed is too high or the oil temperature is high, the piston ring may lose efficacy and lose elasticity, thereby affecting the sealing effect.

Therefore, in view of the above problems, it is desirable to provide a lubricating and sealing structure for an intermediate bearing. The lubricating oil way of the intermediate bearing can be smoother and the use of the lubricating oil is more efficient by using the structure. Meanwhile, the lubricating oil can have a better lubricating oil sealing effect when the concentric shaft structure runs at a high speed.

Disclosure of Invention

The utility model aims to solve the problem of providing a lubricating and sealing structure of an intermediary bearing, which can ensure that the lubricating oil path of the intermediary bearing is smoother and the using amount of the lubricating oil is more efficient; the use of the vacuum trap spiral seal enables the intermediary bearing structure to obtain more excellent sealing effect at high speed.

In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides a lubrication and seal structure of intermediary bearing, includes intermediary bearing, interior axle, outer axle and collection oil cavity, the outer loop and the outer axle fixed connection of intermediary bearing, the inner ring and interior axle fixed connection of intermediary bearing, set up vacuum trap spiral seal structure between the interior axle of intermediary bearing front side and the outer axle, the inlet port of interior axle of vacuum trap spiral seal structure intercommunication, intermediary bearing rear side is equipped with the fender oil board, be equipped with the aperture on the fender oil board, be equipped with the oil hole that unloads of intercommunication collection oil cavity on the outer axle hole of intermediary bearing rear side.

Furthermore, the spiral sealing structure of the vacuum trap is formed by an outer shaft with an inner wall of an optical axis structure, an inner shaft outer wall and a plurality of small holes which are processed with two spiral lines with opposite rotation directions and are arranged along the circumferential direction and communicated with the oil inlet hole.

Further, the center of the two spirals creates a low pressure trap through which fluid on both sides cannot flow.

Further, the inner shaft has a central hole structure at the center of the intermediate bearing position.

The utility model has the advantages that:

the utility model discloses a lubricated and seal structure of this intermediary's bearing has following characteristics:

1. at present, a separated nozzle structure adopted by most of the existing intermediate bearing lubricating structures inevitably generates part of lubricating oil loss, so that the oil supply efficiency of a lubricating oil system is lower, and the lubricating oil consumption is increased. The use of this structure can effectively improve the availability factor of lubricating oil. So that the lubricating oil entering the intermediate bearing can have the effects of lubrication and temperature reduction.

2. Although the currently adopted piston ring sealing technology has the advantage of small axial length, the sealing effect is affected due to the fact that the metal piston ring loses elasticity under high-speed rotation and high temperature. The vacuum trap spiral seal that this structure adopted can effectually carry out the separation to the fluid of sealed both sides for the leakage quantity of lubricating oil is littleer. And the spiral sealing of the vacuum trap has the characteristic of faster sealing speed and better sealing effect. The applicability of its use to a concentric shaft configuration is better.

The use of this structure can improve the lubrication problem that current intermediary's bearing met in using to reduce the use amount of lubricating oil. The concentric shaft structure has wider application prospect.

Drawings

FIG. 1 is a schematic view of a prior art lubrication and sealing structure for an intermediate bearing;

fig. 2 is a schematic view of a lubricating and sealing structure of the intermediate bearing of the present invention;

fig. 3 is a schematic view of the lubricating direction of the oil path of the intermediary bearing of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and examples.

As shown in fig. 2, the utility model discloses a lubricated and seal structure of intermediary's bearing can utilize lubricating oil to lubricate intermediary's bearing more efficient to carry out better sealing to lubricated part under high-speed.

The structure comprises an intermediate bearing 1, a vacuum trap spiral sealing structure 2, an oil baffle plate 3, an inner shaft 4, an outer shaft 5 and an oil collection chamber 6. The flow direction of the oil passage inside the intermediate bearing in this structure is shown in fig. 3.

The outer ring of the intermediate bearing 1 is fixedly connected with the outer shaft 5, and the inner ring of the intermediate bearing 1 is fixedly connected with the inner shaft 4. The front side of the intermediate bearing 1 is sealed by a vacuum trap spiral sealing structure 2. Wherein the inner wall of the outer shaft 5 is of an optical axis structure, and the outer wall of the inner shaft 4 is provided with two spiral lines with opposite rotation directions. The center of the two spirals will create a low pressure trap through which fluid on either side cannot flow.

The inner shaft 4 has a central hole structure at the center of the intermediate bearing position. It is supplied with oil through the oil inlet hole 7 on the right side. The lubricating oil flows from the right side to the left side and is thrown out through a plurality of small holes extending in the axial direction between the intermediate bearing 1 and the spiral seal structure 2 of the vacuum trap by the centrifugal force. Due to the existence of the vacuum trap spiral sealing structure 2, the lubricating oil can only fully lubricate the intermediate bearing 1 towards the right side and take away heat generated during the operation of the intermediate bearing 1. And then through a small hole reserved in the oil baffle plate 3 into the area between the inner shaft 4 and the outer shaft 5. And then enters the oil collecting chamber 6 along the oil discharging hole 8 again under the action of centrifugal force.

Claims

1. The utility model provides a lubricated and seal structure of intermediary bearing, includes intermediary bearing, interior axle, outer axle and collection oil cavity, its characterized in that: the oil-collecting device is characterized in that an outer ring of the intermediate bearing is fixedly connected with an outer shaft, an inner ring of the intermediate bearing is fixedly connected with an inner shaft, a vacuum trap spiral sealing structure is arranged between the inner shaft on the front side of the intermediate bearing and the outer shaft, the vacuum trap spiral sealing structure is communicated with an oil inlet hole of the inner shaft, an oil baffle plate is arranged on the rear side of the intermediate bearing, a small hole is formed in the oil baffle plate, and an oil discharging hole communicated with an oil collecting cavity is formed in an inner shaft of the outer shaft on the rear side of the intermediate bearing.

2. The lubrication and seal structure of an intermediate bearing according to claim 1, wherein: the spiral sealing structure of the vacuum trap is formed by processing two spiral lines with opposite rotation directions on the outer shaft and the outer wall of the inner shaft, the inner wall of which is of an optical axis structure, and a plurality of small holes which are arranged along the circumferential direction and are communicated with an oil inlet.

3. The lubrication and seal structure of an intermediate bearing according to claim 2, wherein: the centers of the two spirals create a low pressure trap through which fluid on either side cannot flow.

4. The lubrication and seal structure of an intermediate bearing according to claim 1, wherein: the inner shaft has a central bore configuration centered on the intermediate bearing location.