CN112503089A

CN112503089A - Thrust sliding bearing

Info

Publication number: CN112503089A
Application number: CN202011428351.4A
Authority: CN
Inventors: 赵卫君; 何奕
Original assignee: B-TOHIN MACHINE (JIANGSU) CO LTD
Current assignee: B-TOHIN MACHINE (JIANGSU) CO LTD
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-03-16

Abstract

The invention discloses a thrust sliding bearing, comprising an annular casing, the annular casing has an annular cavity, and a plurality of wedge-shaped main thrust blocks evenly distributed on the annular casing are arranged on the annular surface of one side of the annular casing. Between the thrust blocks, a fuel injection nozzle surface that sinks relative to the main thrust block is arranged on the annular surface, and the side wall of the main thrust block has a limit that can be limited by the annular cavity and the surface of the fuel injection nozzle to run out of the annular cavity in the thickness direction. Protruding, in the annular cavity, under each main thrust block, there is a plane adjustment block whose fulcrum is inserted into the main thrust block, an arc surface adjustment block with a shape matching is arranged between the adjacent plane adjustment blocks, and the bottom surface of the arc adjustment block is It is embedded in the annular housing through a stepped pin. By adopting the design scheme of the present invention, a single main thrust block can evenly disperse the thrust at the step of the rotating shaft to the entire bearing, can bear a large load, and reduce the thickness of the thrust bearing.

Description

Thrust sliding bearing

Technical Field

The invention belongs to the technical field of fan parts, and particularly relates to a thrust sliding bearing.

Background

The rotating speed of the single-stage high-speed centrifugal fan reaches twenty thousand revolutions per minute, a dipolar motor (2980RPM) is accelerated to reach the rotating speed required by the centrifugal fan through a speed increasing gearbox, and the speed increasing gearbox adopts bearings to bear radial force and axial force. The bearing mainly divide into antifriction bearing, slide bearing, magnetic suspension bearing etc. and slide bearing's effect is generally for offsetting functions such as the radial deviation of pivot, but under special operating mode, the step can be located to the pivot, supports and leans on slide bearing for slide bearing need offset the axial force, and the design that general slide bearing adopted is ordinary solid bearing, or adopts the slide bearing of embedded oil pipe, to offsetting of axial force, does not have fine measure.

Disclosure of Invention

The technical problem is as follows: the invention aims to solve the problem that the existing sliding bearing cannot well offset the axial force caused by the step of the rotating shaft.

The technical scheme is as follows: the invention adopts the following technical scheme:

a thrust sliding bearing characterized in that: including annular casing, annular casing has the toroidal cavity, be equipped with a plurality of evenly distributed wedge-shaped main thrust piece on the annular on one side annular surface of annular casing, set up the oil spout nozzle surface that sinks for the main thrust piece between the main thrust piece on the annular surface, the lateral wall of main thrust piece has can be by toroidal cavity and oil spout nozzle surface restriction at thickness direction run out the spacing arch of toroidal cavity, every main thrust piece has the fulcrum to insert the plane adjusting block of main thrust piece in the toroidal cavity, be equipped with the cambered surface adjusting block of shape adaptation between the adjacent plane adjusting block of toroidal cavity circumference, the bottom surface of cambered surface adjusting block is inlayed in the toroidal casing through the step round pin.

The principle is, when thrust sliding bearing suffered from the axial force, main thrust piece inwards caves in after receiving the axial force, make plane adjustment piece downstream, and further, because the cambered surface adjustment piece that is equipped with the shape adaptation between the adjacent plane adjustment piece of toroidal cavity circumference, make the plane adjustment piece can promote the cambered surface adjustment piece and make circumferential displacement, cambered surface adjustment piece during circumferential displacement will power transmission for adjacent plane adjustment soon, make another plane adjustment piece lift the operation, chain effect, make all other plane adjustment pieces all lifted, improve more atress spaces, the main thrust piece share pressure of help main atress.

Further, a plurality of oil nozzles which are uniformly distributed are arranged on the surface of the oil nozzle.

And the oil film is formed between the surface of the main thrust block and the step of the rotating shaft.

Furthermore, a plurality of oil nozzles which are uniformly distributed and communicated with the annular cavity are arranged on the inner wall of the annular shell.

For forming an oil film between the rotary shaft and the inner wall of the annular housing.

Further, the plane adjusting block is provided with an arc plane block, the arc plane block is provided with an upper bulge and a lower bulge, the upper bulge is embedded on the lower surface of the main thrust block as a fulcrum of the main thrust block, and the total thickness of the lower bulge and the arc plane block is smaller than the height of the annular cavity.

The plane adjusting device has the advantages that the plane adjusting speed is the same as the stress direction of the main thrust block, enough space can be provided for converting stress into displacement and converting the displacement into other plane adjusting blocks for sharing pressure.

Furthermore, the arc surface adjusting block is provided with an arc-shaped plane block, an upper bulge is arranged on the arc-shaped plane block, the special-shaped structure formed by the upper bulge of the arc-shaped plane block and the arc-shaped plane block together is matched with the special-shaped structure formed by the lower bulge of the arc-shaped plane block and the arc-shaped plane block together, and a concave arc-shaped surface is adopted at the joint of the upper bulge of the arc-shaped plane block and the arc-shaped plane block.

Make the quick decurrent displacement of plane adjustment can differentiate decurrent power into downwards and circumferential power through the sunken arcwall face of the last arch of extrusion arc adjusting block and the combination department of arc plane piece for the arc adjusting block carries out the circumference displacement, carries out the transmission of power.

Furthermore, the smooth end face of the step pin is inserted into the lower surface of the cambered surface adjusting block, and the threaded end face of the step pin is fixed in the annular shell.

Through the design of step round pin, prevent the excessive displacement of single cambered surface adjusting block, when single cambered surface adjusting block atress, if there is not the step round pin, the cambered surface adjusting block will shift to the position of the power that does not receive current plane adjusting block, just also can't carry out the transmission of power, simultaneously because the smooth end of step round pin inserts, make it can do certain displacement in mechanical clearance, other balanced adjusting block and the cambered surface adjusting block that are supported each other by of transmission that this displacement can be fine, carry out the balanced sharing of power, and simultaneously, through the step round pin, also can transmit power for bearing housing and bear.

Further, the upper protrusions of the plane adjustment blocks are inserted into the eccentric bottom surface of the main thrust block in the circumferential direction thereof, and the upper protrusions of all the plane adjustment blocks are inserted into the main thrust block in the same eccentric direction.

Through eccentric design for main thrust block can carry out the operation of perk, and after a main thrust block atress, one side is pushed down, and the opposite side can perk, and adjacent main thrust block also can become so under the transmission of force simultaneously, makes the atress more even.

Furthermore, a cylindrical pin capable of being fixedly connected with the fan shell is further fixed on the circumferential outer surface of the annular shell.

Prevent that annular shell from doing the circumferential displacement in fan casing.

Further, the circumferential outer surface of the annular shell is provided with an arc-shaped recess which can abut against the fan shell protrusion and enables the annular shell to be axially limited.

Prevent the annular shell from making axial displacement in the fan shell.

Has the advantages that: compared with the prior art, the invention has the following advantages:

by adopting the design scheme of the invention, the thrust at the step of the rotating shaft can be uniformly dispersed on the whole bearing by the single main thrust block, so that larger load can be borne, and the thickness size of the thrust bearing is reduced.

Drawings

FIG. 1 is a schematic top view of the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A of the present invention;

FIG. 3 is a schematic perspective cross-sectional view of the present invention;

FIG. 4 is a schematic cross-sectional view of the present invention taken along line B-B.

Detailed Description

The invention is further illustrated below with reference to the figures and examples.

Example 1

As shown in fig. 1 to 4, a thrust sliding bearing is characterized in that: including annular casing 1, annular casing 1 has annular cavity 2, be equipped with a plurality of evenly distributed wedge-shaped main thrust piece 3 on annular on one side annular surface of annular casing 1, main thrust piece 3 sets up the fuel sprayer surface 4 that sinks for main thrust piece on the annular surface within a definite time, main thrust piece 3's lateral wall has can be by annular cavity 2 and fuel sprayer surface 4 restriction at the spacing arch (not shown) that the thickness direction ran out annular cavity 1, every main thrust piece 3 is equipped with fulcrum 9 and inserts main thrust piece 3's plane adjusting block 5 in annular cavity 2, be equipped with the cambered surface adjusting block 6 of shape adaptation between the adjacent plane adjusting block 5 of annular cavity 2 circumference, the bottom surface of cambered surface adjusting block 6 inlays in annular casing 1 through step round pin 7.

The limiting bulge in the given figure is arranged on the balance adjusting block, and then the main thrust block fixedly connected with the balance adjusting block can be prevented from sliding out of the cavity by arranging the positioning pin 12 on the side wall.

The injector surface 4 is provided with a number of evenly distributed injectors 8.

The inner wall of the annular shell 1 is provided with a plurality of oil nozzles 8 which are uniformly distributed and communicated with the annular cavity 2.

The plane adjusting block 5 is provided with an arc plane block, the arc plane block is provided with an upper bulge and a lower bulge, the upper bulge is embedded in the lower surface of the main thrust block 3 as a fulcrum 9 of the main thrust block 3, and the total thickness of the lower bulge and the arc plane block is smaller than the height of the annular cavity 2.

The cambered surface adjusting block 6 is provided with an arc-shaped plane block, an upper bulge is arranged on the arc-shaped plane block, the upper bulge of the cambered surface adjusting block 6 and a special-shaped structure formed by the arc-shaped plane block together are matched with the special-shaped structure formed by the lower bulge of the plane adjusting block and the arc-shaped plane block together, and a concave arc-shaped surface is adopted at the joint of the upper bulge of the cambered surface adjusting block 6 and the arc-shaped plane block.

The smooth end surface of the step pin 7 is inserted into the lower surface of the cambered surface adjusting block 6, and the threaded end surface of the step pin 7 is fixed in the annular shell 1.

The upper protrusions of the plane adjustment blocks 5 are inserted into the eccentric bottom surface of the main thrust block 3 in the circumferential direction thereof, and the upper protrusions of all the plane adjustment blocks 5 are inserted into the main thrust block 3 in the same eccentric direction.

And a cylindrical pin 10 which can be fixedly connected with the fan shell is also fixed on the circumferential outer surface of the annular shell 1.

The circumferential outer surface of the annular shell 1 is provided with an arc-shaped recess 11 which can abut against the fan shell protrusion and enables the annular shell 1 to be axially limited.

Prevent the annular shell from making axial displacement in the fan shell.

Claims

1. A thrust sliding bearing is characterized in that: it comprises an annular casing, the annular casing has an annular cavity, and a number of wedge-shaped main thrust blocks evenly distributed on the annular casing are provided on one side annular surface of the annular casing. , between the main thrust blocks, a fuel injection nozzle surface that sinks relative to the main thrust block is arranged on the annular surface. Limiting protrusions, under each main thrust block in the annular cavity is provided with a plane adjustment block whose fulcrum is inserted into the main thrust block, and an arc surface adjustment block with an adapted shape is arranged between the adjacent plane adjustment blocks in the circumferential direction of the annular cavity. The bottom surface of the surface adjustment block is embedded in the annular housing through a stepped pin.

2 . The thrust sliding bearing according to claim 1 , wherein the surface of the fuel injection nozzle is provided with a plurality of uniformly distributed fuel injection nozzles. 3 .

3 . The thrust sliding bearing according to claim 1 , characterized in that: a plurality of evenly distributed fuel injection nozzles communicated with the annular cavity are arranged on the inner wall of the annular housing. 4 .

4 . The thrust sliding bearing according to claim 1 , wherein the plane adjusting block has an arc-shaped plane block, the arc-shaped plane block has an upper protrusion and a lower protrusion, and the upper protrusion is used as the fulcrum of the main thrust block. 5 . It is inlaid on the lower surface of the main thrust block, and the total thickness of the lower protrusion and the arc-shaped flat block is less than the height of the annular cavity.

5. The thrust sliding bearing according to claim 1 or 4, characterized in that: the arc surface adjustment block has an arc plane block, an upper protrusion is provided on the arc plane block, and an upper protrusion of the arc adjustment block is provided. The special-shaped structure formed by the starting and arc-shaped plane blocks is adapted to the shape of the special-shaped structure formed by the lower protrusion of the plane adjustment block and the arc-shaped plane block. Concave curved surface.

6 . The thrust sliding bearing according to claim 1 , wherein the smooth end surface of the stepped pin is inserted into the lower surface of the arc surface adjusting block, and the threaded end surface of the stepped pin is fixed in the annular housing. 7 .

7. The thrust sliding bearing according to claim 1 or 4, wherein the upper protrusion of the plane adjustment block is inserted into the eccentric bottom surface of the main thrust block along its circumferential direction, and the upper protrusions of all the plane adjustment blocks are along the eccentric bottom surface of the main thrust block. Insert the main thrust block in the same eccentric direction.

8 . The thrust sliding bearing according to claim 1 , wherein a cylindrical pin capable of being fixedly connected with the fan casing is also fixed on the outer circumferential surface of the annular casing. 9 .

9 . The thrust sliding bearing according to claim 1 , wherein the outer circumferential surface of the annular casing is provided with a protrusion that can abut against the fan casing, so that the annular casing is axially limited. 10 . arc-shaped depressions.