CN215830972U

CN215830972U - Sliding bearing

Info

Publication number: CN215830972U
Application number: CN202121275986.5U
Authority: CN
Inventors: 王嘉平; 田晓飞; 陈浩
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2022-02-15
Anticipated expiration: 2031-06-08

Abstract

The sliding bearing is used for a gas measuring device, the gas measuring device comprises a supporting casing and a sensing part mounting rotary structure, and the sliding bearing is arranged between the supporting casing and the sensing part mounting rotary structure. The sliding bearing comprises a bearing seat and a bearing inner ring, wherein the bearing inner ring is composed of a plurality of bearing blocks, and the bearing seat is in joggle joint with the plurality of bearing blocks. The sliding bearing can effectively support a sensing part with larger weight to install a rotary structure, and ensures that the rotary process of the testing and sampling sensing part is stable and the position of a measuring point is accurate, so that the measuring result of each performance index is more accurate.

Description

Sliding bearing

Technical Field

The present invention relates to a sliding bearing.

Background

In the process of engine development, a scheme of supporting parts for a full-ring combustion chamber test is required to be determined in key technology attack and part verification stages, key important performance indexes such as total pressure loss, pollution emission and outlet temperature distribution of the combustion chamber parts are verified through the full-ring combustion chamber test, and measurement of the important indexes plays an important role in evaluating the performance of the full-ring combustion chamber test parts, guiding the optimization design of the combustion chamber parts, saving test resources and the like.

One commonly used measurement method at present is swing type measurement, i.e. the test sampling sensing part rotates around the central shaft to traverse the whole measurement ring surface. Because the test sampling sensing part needs high-temperature fuel gas sprayed from the outlet of the straight combustion chamber, a series of water cooling systems need to be designed for the mounting rotary structure of the test sampling sensing part, and the weight of the mounting rotary structure of the sensing part is seriously increased.

In order to support the rotary structure of the test sampling sensing part, ensure the stable rotary process of the test sampling sensing part and the accurate measuring point position, improve the measuring precision, and simultaneously ensure that the rotary structure installed on the sensing part does not directly rub with the support casing to damage the body in the rotary process, a sliding bearing for the combustion chamber gas measuring device needs to be designed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a sliding bearing which is used for supporting a rotary structure of a gas measuring device, ensuring the stability of the rotary process of the gas measuring device and improving the measuring precision.

Above-mentioned slide bearing for gas measuring device, gas measuring device is including supporting the machine casket and receiving the installation revolution mechanic of portion of feeling, slide bearing set up in support the machine casket with receive between the installation revolution mechanic of portion of feeling, slide bearing includes: a bearing seat; the bearing inner ring is composed of a plurality of bearing blocks; and the bearing seat is in joggle joint with the plurality of bearing blocks.

In one or more embodiments, the bearing block is provided with a plurality of bearing blocks, and the bearing blocks are connected with the fastening pieces through the pressing plate after being joggled with the bearing seat, so that the bearing blocks are axially limited.

In one or more embodiments, a tenon is arranged on the inner periphery of the bearing seat, a mortise is arranged on the outer periphery of the bearing block, and the mortise is in joggle joint with the tenon.

In one or more embodiments, the corners of the tenon and/or the mortise are rounded.

In one or more embodiments, the tongue and/or the root of the tongue groove are provided with a groove.

In one or more embodiments, the bearing block is made of a graphite material.

In one or more embodiments, adjacent bearing blocks have a gap therebetween.

In one or more embodiments, one of the bearing seat and the support casing is provided with a boss, and the other is provided with a groove corresponding to the boss.

In one or more embodiments, the bearing block further comprises a projection having a projecting end surface, which in the mounted state is at a higher axial position than the bearing seat end surface.

In one or more embodiments, the fastener is a countersunk screw

The sliding bearing can effectively support the sensing part with large weight to install the rotary structure, and ensures that the rotary process of the sensing part for testing and sampling is stable and the measuring point position is accurate, so that the measuring result of each performance index is more accurate, the sliding bearing is stable and reliable in connection through the mortise structure, meanwhile, the bearing block damaged inside the sliding bearing can be replaced at any time according to the using condition, and the maintenance and use cost in the later period is reduced.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of the structure of the transmission part of the gas measuring device.

FIG. 2 is a side view of a plain bearing assembly according to an embodiment.

FIG. 3 is a front view of a plain bearing assembly according to an embodiment.

FIG. 4 is an enlarged view of a portion of a plain bearing assembly according to an embodiment.

Description of symbol mark

1 testing the sampling sensitive part

2 sensitive part installation revolution structure

3 drive gear

4 support machine casket

5 sliding bearing

6 driven gear

7 bearing seat

8. 9 pressing plate

10 fastener

11 bearing block

12 convex stage

13. 15 root of a tree

14. 16 corner

17 groove

71 connecting groove

72 tenon

73 outer peripheral surface

74 bearing seat end face

101 fastener end face

111 bulge

112 tongue and groove

113 convex end face

Detailed Description

The present invention is further described in the following description with reference to specific embodiments and the accompanying drawings, wherein the details are set forth in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from those described herein, and it will be readily appreciated by those skilled in the art that the present invention can be implemented in many different forms without departing from the spirit and scope of the utility model. It is noted that these and other figures which follow are merely exemplary and not drawn to scale and should not be considered as limiting the scope of the utility model as it is actually claimed.

As shown in figure 1, the transmission part structure of the combustion chamber gas measuring device comprises a test sampling sensing part 1, a sensing part mounting rotary structure 2, a driving gear 3, a driven gear 6, a supporting casing 4 and a sliding bearing 5. The testing and sampling sensing part 1 is arranged at the head of the sensing part installation rotary structure 2, the driven gear 6 is arranged at the tail of the sensing part installation rotary structure 2, the driven gear 6 is driven to rotate through the rotation of the driving gear 3, so that the testing and sampling sensing part 1 at the position 2 rotates around a central rotary shaft, and the measurement of important performance indexes such as total pressure loss, pollution emission, outlet temperature distribution and the like of the full-ring combustion chamber test piece is realized.

The sliding bearing 5 is arranged between the supporting case 4 and the sensing part mounting rotary structure 2, and in the rotary process, the sliding bearing 5 and the sensing part mounting rotary structure 2 move relatively and the supporting case 4 is static relatively.

As shown in fig. 2, the sliding bearing 5 includes a bearing housing 7, a bearing inner ring,

pressure plates

8, 9, and a fastener 10. The bearing inner ring is composed of a plurality of bearing blocks 11, the bearing seat 7 is in joggle joint with the plurality of bearing blocks 11, and the

pressing plates

8 and 9 and the fasteners 10 are arranged on two sides of the bearing seat 7. After joggling between a plurality of bearing blocks 11 and the bearing seat 7, the bearing blocks 11 are connected with the fasteners 10 through the

pressure plates

8 and 9 so as to be axially limited.

In one embodiment shown in fig. 3, the sliding bearing 5 comprises 12 bearing blocks 11, each bearing block 11 has the same structure, and the assembly process of the sliding bearing 5 is as follows: firstly, 12 bearing blocks 11 are sequentially inserted into a connecting groove 71 of a bearing seat 7, then a left pressing plate 8 is assembled to the left side of the bearing seat 7 through 12 fasteners 10, and a right pressing plate 9 is assembled to the right side of the bearing seat 7 through 12 fasteners 10, so that the assembly can be completed.

As shown in fig. 4, the bearing block 11 is joggled with the bearing seat 7, the inner periphery of the bearing seat 7 is provided with a tenon 72, the outer periphery of the bearing block 11 is provided with a mortise 112, and the mortise 112 is joggled with the tenon 72. In another embodiment, the bearing block 7 is slotted with a mortise on the inner circumference and the bearing block 11 is slotted with a tenon on the outer circumference.

Realize the cooperation of bearing piece 11 and bearing frame 7 through the joggle, avoid adopting bolted connection, reduce part quantity, and the joggle is connected firmly, can avoid receiving when the installation revolution mechanic 2 of sense portion revolves around the center pin, bearing piece 11 takes place circumferential movement, improves measurement accuracy.

With continued reference to FIG. 4, in one embodiment, the

corners

14, 16 of the tongue 72 and the groove 112 are both rounded structures, and the

roots

13, 15 of the tongue 72 and the groove 112 are both provided with grooves to prevent interference during assembly.

In one embodiment, the bearing seat 7, the

pressure plates

8, 9 and the fasteners 10 are all made of stainless steel material, which effectively increases the strength and rigidity of the sliding bearing 5 as a whole.

The bearing block 11 is made of graphite material, and the bearing block 5 made of graphite material has strong self-lubricating property, and can run for a long time under the condition of not using lubricating oil, thereby avoiding the structural complexity caused by adopting the lubricating oil and the influence of the volatilization of the lubricating oil on the measurement accuracy of the gas components.

The slide bearing 5 comprises a plurality of mutually independent and structurally identical bearing blocks 11. When test sampling portion 1 is received around the gyration of central revolving axle, bearing block 11 and 2 relative motion of receiving the installation revolution mechanic of portion, can cause the damage to the bearing block 11 bottom surface that graphite was made, consequently, compare in whole circle be a holistic graphite bearing, adopt independent bearing block 11 design, can take place wearing and tearing or brittle fracture in certain bearing block 11, when falling the piece, in time change this bearing block 11, and need not to carry out the replacement of the graphite bearing of whole circle, very big improvement slide bearing 5's life, reduce test piece processing cost.

In addition, a gap is formed between the adjacent bearing blocks 11, and the gap ranges from 0.1mm to 0.2mm and can be guaranteed through part tolerance. Through set up the clearance between adjacent bearing piece 11, can prevent that bearing piece 11 from being heated the mutual extrusion fracture of bearing piece 11 that the inflation leads to because of the friction in the course of the work, improve bearing piece 11's life.

As shown in fig. 2 and 3, the outer circumferential surface 73 of the bearing seat 7 is provided with a boss 12 which engages with a corresponding recess 17 in the support housing 4. In one embodiment shown in fig. 3, the bearing seat 7 is provided with 2 evenly distributed bosses 12 on its outer circumferential surface 73. In other embodiments, the bosses 12 may be provided at other circumferential positions of the bearing housing 7, and the number is not limited thereto. Through the cooperation of boss 12 and recess 17, can carry out circumference spacing to slide bearing 5, prevent that the installation revolution mechanic 2 of portion of being felt from driving slide bearing 5 gyration in the gyration process, produce wearing and tearing to supporting the inner wall of machine case 4.

In one embodiment, the bearing block 11 further includes a protruding portion 111, the protruding portion 111 has a protruding end surface 113, and in the installed state, the axial position of the protruding end surface 113 is higher than that of the bearing seat end surface 74, so that in the rotating process, the bearing seat end surface 74 is prevented from directly contacting the sensing portion mounting rotating structure 2 to generate abrasion, and the service life of the bearing seat 7 and the sensing portion mounting rotating structure 2 is prolonged.

In one embodiment, the fastening member 10 is a countersunk screw, and the fastening member end surface 101 is flush with the bearing seat end surface 74 by using the countersunk screw, so that the fastening member end surface 101 is prevented from being worn by the contact with the sensing part mounting rotation structure 2 during the rotation process, and the service life of the sensing part mounting rotation structure 2 is prolonged.

The sliding bearings 5 are arranged at the two ends of the supporting casing 4, so that the sensing part with larger weight can be effectively supported to be provided with the rotary structure 2, the stability of the rotary process of the testing and sampling sensing part 1 and the accuracy of the position of a measuring point are ensured, and the measuring results of various performance indexes are more accurate. Meanwhile, the sensitive part mounting rotary structure 2 does not directly rub the supporting casing 4 to damage the body in the rotary process. Above-mentioned slide bearing 5's simple structure, low in manufacturing cost realizes connecting through the tongue-and-groove structure and stabilizes reliably, can change the bearing piece 11 of slide bearing 5 internal damage at any time according to in service behavior simultaneously, has reduced the maintenance use cost in later stage.

Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the utility model, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.

Claims

1. Slide bearing for gas measuring device, gas measuring device is including supporting the machine casket and receiving the installation revolution mechanic of portion of feeling, slide bearing set up in support the machine casket with receive between the installation revolution mechanic of portion of feeling, its characterized in that, slide bearing includes:

a bearing seat; and

the bearing inner ring consists of a plurality of bearing blocks;

and the bearing seat is in joggle joint with the plurality of bearing blocks.

2. The plain bearing of claim 1, further comprising a pressure plate and a fastener, wherein the plurality of bearing blocks are connected to the fastener through the pressure plate after being joggled with the bearing seat to axially limit the bearing blocks.

3. The plain bearing according to claim 1, wherein a tenon is provided on an inner periphery of the bearing seat, and a mortise is provided on an outer periphery of the bearing block, the mortise being joggled with the tenon.

4. A plain bearing according to claim 3, wherein the corners of the tenons and/or mortises are of rounded configuration.

5. A plain bearing according to claim 3, wherein the root of the tenon and/or the mortise is provided with a groove.

6. A plain bearing according to claim 1, wherein the bearing blocks are made of graphite material.

7. A plain bearing according to claim 1, wherein adjacent bearing blocks have a gap therebetween.

8. A plain bearing according to claim 1, wherein one of the bearing seat and the support casing is provided with a boss, and the other is provided with a recess corresponding to the boss.

9. A plain bearing according to claim 1, wherein the bearing block further comprises a projection having a projecting end surface which, in the mounted state, is at a higher axial position than the bearing seat end surface.

10. A plain bearing according to claim 2, wherein the fastener is a countersunk screw.