CN109958706B - Low-speed heavy-load aligning radial sliding bearing and adjusting method thereof - Google Patents
Low-speed heavy-load aligning radial sliding bearing and adjusting method thereof Download PDFInfo
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- CN109958706B CN109958706B CN201910351404.8A CN201910351404A CN109958706B CN 109958706 B CN109958706 B CN 109958706B CN 201910351404 A CN201910351404 A CN 201910351404A CN 109958706 B CN109958706 B CN 109958706B
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- seat ring
- tile
- cover plate
- wedge
- bearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
- F16C23/02—Sliding-contact bearings
- F16C23/04—Sliding-contact bearings self-adjusting
- F16C23/043—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings
- F16C23/045—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings for radial load mainly, e.g. radial spherical plain bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/02—Sliding-contact bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention provides a low-speed heavy-load aligning radial sliding bearing. The invention comprises the following steps: the tile body that sits in the casing still includes: the shoe comprises a seat ring, a wedge and a cover plate, wherein the shoe body is arranged in the seat ring, the seat ring is fixed in a machine shell, and the wedge is arranged between the shoe body and the seat ring. The tile body is composed of at least two segmented tiles with the same specification, the inner diameter of the tile body is a cylindrical surface, and the outer diameter of the tile body is a spherical surface. The invention compensates errors caused by different concentricity and shaft deflection by adjusting the axial position of the oblique iron, and has good shock resistance. The contact mode of the tile body and the oblique iron is spherical surface to cylindrical surface. When the shaft is deformed, the bearing is automatically aligned, so that the eccentric load and eccentric wear condition is eliminated, and the service life of the bearing is prolonged. And adjusting the positions of the two inclined irons of each block-type bearing bush to ensure that the bearing is inclined to a certain extent, and artificially establishing an oil wedge.
Description
Technical Field
The invention relates to the technical field of sliding bearings, in particular to a low-speed heavy-load aligning radial sliding bearing and an adjusting method thereof.
Background
The bearing working under sliding friction is called a sliding bearing, and the radial sliding bearing only bears radial load and can be divided into a fixed-bush radial sliding bearing, a self-positioning radial sliding bearing, a tilting-pad radial sliding bearing and a wedge plate supporting structure radial sliding bearing according to a radial bearing supporting mode.
The fixed radial sliding bearing is shown in fig. 3, the bearing body consists of an upper half and a lower half, and bearing materials are directly poured into the bearing body. The outer circle of the bearing body is provided with 4 radial adjusting cushion blocks, and the bearing clearance is adjusted by scraping the adjusting cushion blocks. The bearing clearance adjustment needs to repeatedly grind and scrape the cushion blocks, so that the workload is high; the system stability is low, and the service life of the bearing is relatively short; the automatic centering function is not provided, and the automatic centering device cannot adapt to the working condition of misalignment.
The self-aligning radial sliding bearing is shown in fig. 4, and the supporting mode is different from the fixed radial sliding bearing in that the shape of the bearing body is spherical. When the center of the rotor changes to cause the shaft neck to incline, the bearing can be automatically adjusted along with the rotation of the shaft neck, so that the gap between the shaft neck and the bearing bush is kept unchanged in the whole length of the bearing bush. However, the processing and adjustment of the bearing are troublesome, the disassembly and assembly are difficult, and the bearing body needs to be integrally disassembled.
The tilting pad bearing is generally composed of a plurality of arc-shaped pads, as shown in fig. 5, and the pivot is composed of a freely swingable structure. The bearing sleeve is arranged in the shell, each tile in the tilting pad bearing is supported in the bearing sleeve through a spherical pin and a gasket at the back of the bearing sleeve, and the tile can swing around the spherical supporting pin, so that the tile can swing freely along with different rotation speeds, loads and bearing temperatures during working, and a plurality of oil wedges are formed around the diameter of the shaft; meanwhile, the centering requirement of the shaft diameter can be met. The outer circle of the bearing body is provided with an adjusting gasket for adjusting the bearing clearance. The contact mode of the tilting pad and the spherical support pin is point contact, and the impact resistance is weaker than that of line contact; under the working condition of very low rotating speed, the oil film between the bearings is difficult to be in a convergent wedge shape, namely, the dynamic pressure lubricating oil film is difficult to be formed; the bearing clearance adjustment needs to repeatedly grind and scrape the gasket, so that the workload is high; the bearing has no interchangeability; the disassembly and assembly are difficult, the bearing body is required to be disassembled, and the bearing bush is extracted in the radial direction.
The radial sliding bearing with wedge plate structure is shown in fig. 6 and 7, the bearing is composed of a plurality of arc-shaped tiles, the tiles are supported on the wedge plate through spherical pins on the back surfaces of the tiles, the wedge plate is composed of two matched inclined blocks, one wedge block is fixed in the bearing body, and the purpose of adjusting the gap is achieved by adjusting the axial displacement of the other inclined block. Wherein, the supporting mode of the spherical pin and the inclined block belongs to point contact; under the heavy-load low-speed working condition, a pressure oil film cannot be artificially formed; under the heavy load condition, the single-point support enables the tile to bend and deform, thereby affecting the shape of the working surface of the tile and being not beneficial to forming hydrodynamic lubrication; the related parts are more, the structure is complex, and the system stability is reduced.
Disclosure of Invention
According to the above technical problems, a low-speed heavy-load aligning radial sliding bearing and an adjusting method thereof are provided. The invention adopts the following technical means:
a low speed heavy duty self aligning radial slide bearing comprising: the tile body that sits in the casing still includes: the shoe comprises a seat ring, a wedge and a cover plate, wherein the shoe body is arranged in the seat ring, the seat ring is fixed in a machine shell, the wedge is arranged between the shoe body and the seat ring, an inclined plane groove is formed in the inner diameter of the seat ring, the inclined plane angle of the wedge is matched with that of the seat ring, the other surface of the wedge is a cylindrical surface and is matched with the shape of the back surface of the shoe body, cylindrical pins are arranged on two sides of the shoe body, the cylindrical pins are clamped between a first cover plate and a second cover plate, the wedge is close to the side of the first cover plate and provided with a threaded hole, the axial position of the wedge is adjusted by adjusting the screwing depth of an adjusting screw in threaded hole, and then the gap between the shoe body and a shaft and the inclination angle of the shoe body facing the rotating direction are adjusted.
Further, the tile body is composed of at least two segmented tiles with the same specification, the inner diameter of the composed tile body is a cylindrical surface, the outer diameter of the composed tile body is a spherical surface, and the aligning function is achieved through the cooperation of the outer diameter of the spherical surface and the inner diameter of the cylindrical surface of the inclined iron.
Further, each sectional type tile is connected with a gland of the bearing end face through a cylindrical pin on the side edge, and two inclined irons are arranged on the outer side of the tile back.
Further, the two inclined irons of each segmented tile are symmetrically distributed by taking the central line of the segmented tile as an axis.
Further, the second cover plate is fixed on the flange-free side of the end face of the seat ring, and the first cover plate is fixed on the flange-free side of the end face of the seat ring.
Further, a dial is arranged on the adjusting screw rod and is used for observing and recording the axial displacement of the wedge during adjustment.
Further, the inclination angle of the inclined iron is 1:20-1:40.
The invention also provides an adjusting method of the low-speed heavy-load aligning radial sliding bearing, which comprises the following steps:
installing a seat ring into the shell, installing a second cover plate, connecting the tile with the second cover plate through a cylindrical pin after determining the position of the second cover plate, and then installing a cylindrical pin, a diagonal iron and an adjusting screw rod on the other side to connect the seat ring with the first cover plate;
the position of the shaft is adjusted to enable the axis of the shaft to meet the running requirement of equipment;
rotating the screw rod to insert the oblique iron into the gap between the seat ring and the tile back along the axial direction until the gap between the tile and the shaft is zero;
the screw rod is reversely rotated to enable the tile block and the shaft to generate a gap, the scale of the dial is read until the design value, the chute iron is adjusted to a preset position according to the design requirement, and the gap at the oil inlet end of the tile block is enabled to be larger than the gap at the oil outlet end of the tile block.
Further, the tile body is composed of at least two sectional tiles with the same specification, two inclined irons are arranged on the outer side of the tile back of each sectional tile, specifically, each sectional tile is required to be connected with a second cover plate, and each inclined iron is adjusted in sequence until the gap of the oil inlet end of each sectional tile is larger than the gap of the oil outlet end of each sectional tile.
The invention has the following advantages:
1. the contact mode of the shoe body and the oblique iron is a spherical-to-cylindrical surface, when the shaft is deformed, the bearing is automatically aligned, the eccentric load and eccentric wear condition is eliminated, the service life of the bearing is prolonged, the support mode belongs to line contact, the common sliding bearing contact mode is point contact, and compared with the point contact, the line contact has better shock resistance and higher reliability.
2. The axial position of the oblique iron is adjusted so as to adjust the radial clearance of the tile, so that errors caused by non-concentricity and shaft deflection are compensated, and the shock resistance is good. The stability of the system is improved, the service life of the bearing is prolonged, the adjusting part is provided with a dial, and the operation is simple and easy to observe.
3. The invention can respectively adjust the positions of two inclined irons of each block bearing bush to ensure that the bearing generates certain inclination, thereby artificially establishing an oil wedge which is beneficial to the formation of the pressure oil film.
4. The oblique iron is easy to assemble and disassemble, and the tile blocks can be axially assembled, disassembled and replaced under the condition of no movement in the radial direction.
5. The tiles can be replaced according to the abrasion condition, and the gaps of the tiles are adjusted one by one through adjusting the inclined iron after the tiles are installed, so that the consistency of the gaps of the bearings is ensured.
For the reasons, the invention can be widely popularized in the technical field of sliding bearings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram showing a specific structure of a low-speed heavy-load aligning radial sliding bearing.
FIG. 2 is a schematic diagram showing the specific distribution of the wedge and segmented tiles in an embodiment of the present invention.
Fig. 3 is a schematic view of a specific structure of a fixed radial sliding bearing in the prior art.
Fig. 4 is a schematic diagram showing a specific structure of a self-aligning radial sliding bearing in the prior art.
Fig. 5 is a schematic diagram showing a specific structure of a tilting pad bearing according to the prior art.
Fig. 6 is a schematic diagram of a radial sliding bearing with a wedge plate structure in the prior art.
Fig. 7 is a partial cross-sectional view of a prior art wedge plate structure radial slide bearing embodiment.
In the figure: 1. a tile body; 2. a wedge; 3. a seat ring; 4. a first cover plate; 5. a second cover plate; 6. adjusting a screw; 7. a nut; 8. a dial scale.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, an embodiment of the present invention provides a low-speed heavy-duty self-aligning radial sliding bearing, including: the tile body 1 located in the casing further comprises: seat ring 3, angle iron 2 and apron, the tile body is installed in seat ring 3, seat ring 3 is fixed in the casing, tile body 1 with set up between the seat ring 3 the angle iron 2, the processing of seat ring 3 internal diameter has the inclined plane groove, angle iron 2 inclined plane angle and seat ring inclined plane groove match, and the angle iron 2 another side is the cylinder, shape matching with the tile body 1 basic back, tile body 1 both sides are equipped with the cylindric lock for its joint is between first apron 4 and second apron 5, the screw hole is seted up near first apron side to angle iron 2, through adjusting screw in screw rod 6's screw in degree of depth adjustment the axial position of angle iron 2, and then adjusts the clearance between tile body 1 and the axle and the inclination of tile body 1 against the direction of rotation.
In order to facilitate installation, debugging and later maintenance, as a preferred embodiment, as shown in fig. 2, the tile body 1 is composed of at least two segmented tiles with the same specification, the inner diameter of the composed tile body is a cylindrical surface, the outer diameter is a spherical surface, and the aligning function is realized by matching the outer diameter of the spherical surface with the inner diameter of the cylindrical surface of the inclined iron 2, in this embodiment, the number of the segmented tiles is 8.
The conditions for forming an oil wedge for hydrodynamic lubrication of a sliding bearing are three: (1) the sliding surface has a certain sliding speed, (2) the lubricating medium has a certain viscosity, and (3) the surfaces which move relatively against the moving direction have convergent oil wedges. The two surfaces which are mutually moved by the above condition form dynamic pressure oil films, bear load and run safely. The working conditions aimed by the invention are as follows: although the sliding speed is low (less than 1 m/s), the oil film is thin and the safety is low. In order to generate oil wedges, improve the capability of forming an oil film and achieve the aim of safe operation, as a preferred embodiment, each segmented shoe is connected with a bearing end face gland through a cylindrical pin on the side edge, and two inclined irons 2 are arranged on the outer side of the shoe back, wherein the number of the inclined irons 2 is 16 in the embodiment.
In order to adjust the gaps between the oil inlet and the oil outlet to be different values in advance, the gap between the oil inlet end and the oil outlet end of each segment tile is large, the gap between the oil inlet end and the oil outlet end is small, and an oil wedge which is convenient for realizing hydrodynamic lubrication is formed.
As a preferred embodiment, the second cover plate 5 is fixed to the flange-less side of the end face of the seat ring, and the first cover plate is fixed to the flange-less side of the end face of the seat ring.
In order to facilitate observation and recording of axial displacement of the wedge during adjustment, as a preferred embodiment, a dial is arranged on the adjusting screw.
In order to ensure that the position of the chute is determined after installation, as a preferable implementation mode, the inclination angle of the chute is 1:20-1:40, and the chute can be self-locked.
The invention also provides an adjusting method of the low-speed heavy-load aligning radial sliding bearing, which comprises the following steps:
the seat ring is arranged in the shell, a second cover plate 5 is arranged, the position is determined, each sectional tile is connected with the second cover plate 5 through a cylindrical pin, and then the cylindrical pin, the inclined iron 2 and the adjusting screw 6 are arranged to connect the seat ring 3 with the first cover plate 4;
the position of the shaft is adjusted to enable the axis of the shaft to meet the running requirement of equipment;
rotating the adjusting screw 6 to insert all the inclined irons 2 into the gap between the seat ring 3 and the tile backs of the sectional tiles along the axial direction until the gap between each sectional tile and the shaft is zero;
the adjusting screw 6 is reversely rotated to enable the tile body and the shaft to generate a gap, the scale of the dial 8 is read until the design value, and two inclined irons 2 on each segmented tile are respectively adjusted to different positions or displacements according to the design requirement, so that the gap at one oil inlet end of each tile is large, the gap at one oil outlet end of each tile is small, and an oil wedge convenient for realizing hydrodynamic lubrication is formed.
During the installation process, the adjusting screw 6 extends into the seat ring from the threaded end along the direction parallel to the inclined surface of the oblique iron through the through hole in the first cover plate 4. One threaded end of the adjusting screw 6 is screwed into the screw hole on the side face of the oblique iron until the plane of the boss of the screw is completely attached to the first cover plate 4, and at the moment, the adjusting screw is fixed by the nut 7. The inclined iron 2 is axially inserted into a gap between the seat ring and the radial bearing bush back along the inclined surface groove of the seat ring 3 from the thinner side, and one threaded end of the adjusting screw 6 is matched with a screw hole arranged on the thicker side of the inclined iron side.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. A low speed, heavy duty, self aligning radial slide bearing comprising: the tile body that sits in the casing still includes: the shoe comprises a seat ring, a wedge and a cover plate, wherein the shoe body is arranged in the seat ring, the seat ring is fixed in a machine shell, the wedge is arranged between the shoe body and the seat ring, an inclined plane groove is formed in the inner diameter of the seat ring, the inclined plane angle of the wedge is matched with that of the seat ring, the other surface of the wedge is a cylindrical surface and is matched with the shape of the back surface of the shoe body, cylindrical pins are arranged on two sides of the shoe body, the cylindrical pins are clamped between a first cover plate and a second cover plate, the wedge is close to the side of the first cover plate and provided with a threaded hole, the axial position of the wedge is adjusted by adjusting the screwing depth of an adjusting screw in threaded hole, and then the gap between the shoe body and a shaft and the inclination angle of the shoe body facing the rotating direction are adjusted.
2. The low-speed heavy-duty aligning radial sliding bearing according to claim 1, wherein the shoe body is composed of at least two segmented shoes with the same specification, the inner diameter of the shoe body is a cylindrical surface, the outer diameter is a spherical surface, and the aligning function is realized through the cooperation of the outer diameter of the spherical surface and the inner diameter of the cylindrical surface of the oblique iron.
3. The low-speed heavy-duty self-aligning radial sliding bearing according to claim 2, wherein each segmented shoe is connected with a bearing end face cover plate through a cylindrical pin on the side edge, and two inclined irons are arranged on the outer side of the shoe back.
4. A low speed, heavy duty self aligning radial slide bearing as claimed in claim 3 wherein the two ramps of each segmented shoe are arranged axisymmetrically about the midline of the segmented shoe.
5. The low-speed heavy-duty self-aligning radial slide bearing according to claim 1, wherein the second cover plate is fixed on the flange-free side of the seat ring end surface, and the first cover plate is fixed on the flange-free side of the seat ring end surface.
6. The low-speed, heavy-duty, self-aligning radial slide bearing according to claim 1, wherein the adjusting screw is provided with a dial for observing and recording the axial displacement of the ramp upon adjustment.
7. The low-speed heavy-duty self-aligning radial sliding bearing according to claim 4, wherein the angle of inclination of the ramp is 1:20-1:40.
8. A method of adjusting a low speed, heavy duty, self aligning radial slide bearing according to any one of claims 1 to 7, comprising the steps of:
installing a seat ring into the shell, installing a second cover plate, connecting the tile with the second cover plate through a cylindrical pin after determining the position of the second cover plate, and then installing a cylindrical pin, a diagonal iron and an adjusting screw rod on the other side to connect the seat ring with the first cover plate;
the position of the shaft is adjusted to enable the axis of the shaft to meet the running requirement of equipment;
rotating the screw rod to insert the oblique iron into the gap between the seat ring and the tile back along the axial direction until the gap between the tile and the shaft is zero;
the screw rod is reversely rotated to enable the tile block and the shaft to generate a gap, the scale of the dial is read until the design value, the chute iron is adjusted to a preset position according to the design requirement, and the gap at the oil inlet end of the tile block is enabled to be larger than the gap at the oil outlet end of the tile block.
9. The method of adjusting a low-speed heavy-duty self-aligning radial slide bearing according to claim 8,
the tile body is composed of at least two sectional tiles with the same specification, two inclined irons are arranged on the outer side of each sectional tile back, and specifically, each sectional tile needs to be connected with a second cover plate respectively, and each inclined iron is adjusted in sequence until the gap of the oil inlet end of each sectional tile is larger than the gap of the oil outlet end of each sectional tile.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910351404.8A CN109958706B (en) | 2019-04-28 | 2019-04-28 | Low-speed heavy-load aligning radial sliding bearing and adjusting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910351404.8A CN109958706B (en) | 2019-04-28 | 2019-04-28 | Low-speed heavy-load aligning radial sliding bearing and adjusting method thereof |
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| Publication Number | Publication Date |
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| CN109958706A CN109958706A (en) | 2019-07-02 |
| CN109958706B true CN109958706B (en) | 2023-09-26 |
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| CN201910351404.8A Active CN109958706B (en) | 2019-04-28 | 2019-04-28 | Low-speed heavy-load aligning radial sliding bearing and adjusting method thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113042161B (en) * | 2019-12-27 | 2024-04-12 | 江苏华洋电力机械制造有限公司 | Novel ball mill lining tile mounting structure |
| CN113606256B (en) * | 2021-09-29 | 2021-12-07 | 启东锦桥轴承有限公司 | Rotary bearing with adjusting structure and convenient for self-locking and fixing |
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| CN103953644A (en) * | 2014-05-21 | 2014-07-30 | 无锡杰尔压缩机有限公司 | Radially adjustable tiltable pad bearing |
| CN206017433U (en) * | 2016-08-23 | 2017-03-15 | 湖南湘化机汽轮机有限公司 | Radial skew bearing |
| CN207470604U (en) * | 2017-11-22 | 2018-06-08 | 中车集团台州第七八一六工厂 | A kind of bush(ing) bearing |
| CN109611448A (en) * | 2018-12-21 | 2019-04-12 | 成都利君实业股份有限公司 | A kind of adjusting center sliding bearing |
| CN210034165U (en) * | 2019-04-28 | 2020-02-07 | 大连三环复合材料技术开发股份有限公司 | Low-speed heavy-load aligning radial sliding bearing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101819270B1 (en) * | 2014-12-24 | 2018-01-16 | 두산중공업 주식회사 | Tiliting pad thrust bearing and tiliting pad thrust bearing assembly |
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2019
- 2019-04-28 CN CN201910351404.8A patent/CN109958706B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953644A (en) * | 2014-05-21 | 2014-07-30 | 无锡杰尔压缩机有限公司 | Radially adjustable tiltable pad bearing |
| CN206017433U (en) * | 2016-08-23 | 2017-03-15 | 湖南湘化机汽轮机有限公司 | Radial skew bearing |
| CN207470604U (en) * | 2017-11-22 | 2018-06-08 | 中车集团台州第七八一六工厂 | A kind of bush(ing) bearing |
| CN109611448A (en) * | 2018-12-21 | 2019-04-12 | 成都利君实业股份有限公司 | A kind of adjusting center sliding bearing |
| CN210034165U (en) * | 2019-04-28 | 2020-02-07 | 大连三环复合材料技术开发股份有限公司 | Low-speed heavy-load aligning radial sliding bearing |
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