CN107327474B - Tilting pad thrust bearing capable of detecting axial force of rotary machine - Google Patents
Tilting pad thrust bearing capable of detecting axial force of rotary machine Download PDFInfo
- Publication number
- CN107327474B CN107327474B CN201710725598.4A CN201710725598A CN107327474B CN 107327474 B CN107327474 B CN 107327474B CN 201710725598 A CN201710725598 A CN 201710725598A CN 107327474 B CN107327474 B CN 107327474B
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- CN
- China
- Prior art keywords
- bearing
- disc
- tilting pad
- axial force
- extrusion
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Classifications
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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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
- F16C17/06—Sliding-contact bearings for exclusively rotary movement for axial load only with tiltably-supported segments, e.g. Michell 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
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/12—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring axial thrust in a rotary shaft, e.g. of propulsion plants
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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
- F16C2233/00—Monitoring condition, e.g. temperature, load, vibration
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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
- F16C2360/00—Engines or pumps
- F16C2360/23—Gas turbine engines
-
- 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
- F16C2360/00—Engines or pumps
- F16C2360/43—Screw compressors
-
- 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
- F16C2360/00—Engines or pumps
- F16C2360/44—Centrifugal pumps
Abstract
The invention discloses a tilting pad thrust bearing capable of detecting axial force of a rotary machine, which comprises a bearing body, a thrust disc, a tilting pad, a swinging block, a bearing disc and an end cover, wherein the bearing disc is arranged on the bearing body; the thrust disc, the tilting pad, the swinging block and the bearing disc are all arranged in the bearing body and are locked and positioned through the end cover; the end surfaces of the bearing disks are provided with a plurality of arc-shaped extrusion blocks, and the extrusion blocks on the two bearing disks are respectively clung to the bearing body and the end cover; a groove is arranged on the outer side of the extrusion block, so that a gap of 4-6 mm is formed between the extrusion block and the bearing disc; and a working strain gauge is adhered to the inner side of the extrusion block. The axial force measuring device is simple in structure, and can realize online accurate measurement of the axial force on the basis of not changing the assembling structure of the tilting pad thrust bearing.
Description
Technical Field
The invention relates to a rotary machine axial force detection device, in particular to a tilting pad thrust bearing capable of detecting a rotary machine axial force.
Background
At present, large-scale rotating mechanical equipment such as centrifugal pumps, steam turbines and compressors are developed to be large-scale and high-speed, the reliability problem is very important, and the size and the variation trend of axial force are one of important parameters which influence the safe operation and predict the service life of the equipment. Because the axial force is difficult to accurately calculate by a theoretical method and an empirical method, accidents such as abrasion, damage, main shaft fracture and the like of the thrust bearing occur sometimes, actual measurement can be carried out only by a test method, and the online accurate measurement of the actual axial force of large-scale equipment has great significance for improving the safety of product operation. However, for a large-scale rotating machine which adopts a tilting pad thrust bearing and a thrust disc to bear unbalanced axial force, the structure of a bearing box body is complex, the space is limited, and in addition, the bearing pad block can swing, so that an elastic element with a conventional structure cannot be selected to test the axial force; so that the on-line detection of the axial force cannot be accurately performed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the problem that the axial force of the rotary machine cannot be accurately measured on line, provides the tilting pad thrust bearing capable of detecting the axial force of the rotary machine, and can realize the accurate measurement on line of the axial force on the basis of not changing the assembly structure of the tilting pad thrust bearing.
In order to solve the technical problem, the technical scheme adopted by the invention is as follows: a tilting pad thrust bearing capable of detecting axial force of a rotary machine comprises a bearing body, a thrust disc, a tilting pad, a swinging block, a bearing disc and an end cover; the thrust disc, the tilting pad, the swinging block and the bearing disc are all arranged in the bearing body and are locked and positioned through the end cover; wherein, the tilting pad, the swinging block and the bearing disc are symmetrically distributed on two sides of the thrust disc; the end surfaces of the bearing disks are provided with a plurality of arc-shaped extrusion blocks, and the extrusion blocks on the two bearing disks are respectively clung to the bearing body and the end cover; the method is characterized in that: a groove is arranged on the outer side of the extrusion block, so that a gap of 4-6 mm is formed between the extrusion block and the bearing disc; and a working strain gauge is adhered to the inner side of the extrusion block.
This scheme utilizes the cantilever beam to draw and press the deformation principle on tilting pad thrust bearing bears the basis of a structure, provides a novel axial force test structure, and great, and stable position department (extrusion piece department) pastes the work foil gage in axial strain variation, and the minimum (bear the weight of on the dish) position department of strain variation pastes the temperature compensation foil gage, constitutes measurement system with external circuit, produces little deformation through the extrusion and carries out axial force actual measurement.
Furthermore, a temperature compensation strain gauge is pasted and arranged on the bearing plate between two adjacent extrusion blocks.
Furthermore, the extrusion blocks are 3 and are uniformly distributed around the bearing plate.
Furthermore, an annular groove which surrounds the central hole in a circle is formed in the end part of the bearing disc, close to the central hole, and the working strain gauge extends into the annular groove.
Compared with the prior art, the invention has the following advantages:
1. under the condition of not changing the bearing assembling structure, the installation, the use and the interchange of the standard thrust pads can be ensured.
2. The axial force action time can be slowed down, the temperature of the bearing is reduced, and the service life of the bearing is prolonged.
3. The axial force on-line monitoring can be realized, and the measurement accuracy and sensitivity are high and the range is wide.
Drawings
Fig. 1 is a schematic structural view of a tilting pad thrust bearing.
Fig. 2 is a schematic structural view of the carrier tray.
Fig. 3 is a sectional view taken along a-a of fig. 2.
In the figure: the device comprises a bearing body 1, a thrust disc 2, a tilting pad 3, a swinging block 4, a bearing disc 5, an extrusion block 6, a working strain gauge 7 and a temperature compensation strain gauge 8.
Detailed Description
The invention will be further explained with reference to the drawings and the embodiments.
Example (b): referring to fig. 1, 2 and 3, a tilting pad thrust bearing capable of detecting axial force of a rotating machine includes a bearing body 1, a thrust disc 2, a tilting pad 3, a rocking block 4, a carrier disc 5 and an end cover. The thrust disc 2, the tilting pad 3, the swinging block 4 and the bearing disc 5 are all arranged in the bearing body 1 and are locked and positioned through an end cover; wherein, the tilting pads 3, the swing pads 4 and the bearing disc 5 are symmetrically distributed on two sides of the thrust disc 2. The end surface of the bearing plate 5 is provided with a plurality of arc-shaped extrusion blocks 6, and the extrusion blocks 6 are 3 and are uniformly distributed around the bearing plate 5; the extrusion blocks 6 on the two bearing disks 5 are respectively clung to the bearing body 1 and the end cover.
A groove is arranged on the outer side of the extrusion block 6, so that a gap of 4-6 mm is formed between the extrusion block 6 and the bearing disc 5; in this way, the squeeze block 6 is deformed when the carrier plate 5 is subjected to an axial force, and the amount of deformation is maximally reflected inside the squeeze block 6 due to the clearance between the squeeze block 6 and the carrier plate 5. A working strain gauge 7 is adhered to the inner side of the extrusion block 6; the deformation quantity of the extrusion block 6 can be detected quickly and accurately by the working strain gauge 7, and the axial force of the bearing can be detected accurately by matching with an external circuit. In the actual construction process, because the width of the working strain edge is wider (about 10 mm), and the thickness of the extrusion block 6 is smaller (only about 8 mm), the end part of the bearing disc 5 close to the central hole is provided with an annular groove surrounding the central hole for a circle, the working strain sheet 7 extends into the annular groove, and the sum of the depth of the annular groove and the thickness of the extrusion block 6 is greater than the width of the working strain sheet 7 (namely, the depth of the annular groove is more than 2 mm), so that the working strain sheet 7 can be better assembled, and the measurement accuracy is not influenced.
In the specific implementation process, a temperature compensation strain gauge 8 is adhered to the bearing disc 5 between two adjacent extrusion blocks 6; thereby further improving the accuracy of the axial force detection.
This scheme utilizes the cantilever beam to draw and press the deformation principle on tilting pad thrust bearing bears the basis of dish 5 structure, proposes a novel axial force test structure, and great, and stable position department (extrusion piece 6 department) pastes work foil gage 7 at axial strain variation, and the minimum (bearing on the dish 5) position department of strain variation pastes temperature compensation foil gage 8, constitutes measurement system with external circuit, produces little deformation through the extrusion and carries out axial force actual measurement.
It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that the technical solutions of the present invention can be modified or substituted with equivalent solutions without departing from the spirit and scope of the technical solutions, and all should be covered in the claims of the present invention.
Claims (2)
1. A tilting pad thrust bearing capable of detecting axial force of a rotary machine comprises a bearing body, a thrust disc, a tilting pad, a swinging block, a bearing disc and an end cover; the thrust disc, the tilting pad, the swinging block and the bearing disc are all arranged in the bearing body and are locked and positioned through the end cover; wherein, the tilting pad, the swinging block and the bearing disc are symmetrically distributed on two sides of the thrust disc; the end surfaces of the bearing disks are provided with a plurality of arc-shaped extrusion blocks, and the extrusion blocks on the two bearing disks are respectively clung to the bearing body and the end cover; the method is characterized in that: a groove is arranged on the outer side of the extrusion block along the radial direction of the bearing disc, so that a gap of 4-6 mm is formed between the part of the extrusion block close to the outer side of the extrusion block along the radial direction of the bearing disc and the bearing disc; a working strain gauge is adhered to the inner side of the extrusion block along the radial direction of the bearing disc; the end part of the bearing disc is close to the central hole and is provided with an annular groove which surrounds the central hole for a circle, and the working strain gauge extends into the annular groove; and a temperature compensation strain gauge is adhered to the bearing plate between two adjacent extrusion blocks.
2. A tilting pad thrust bearing capable of detecting axial forces of a rotating machine according to claim 1 wherein: the extrusion blocks are 3 and are uniformly distributed around the bearing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710725598.4A CN107327474B (en) | 2017-08-22 | 2017-08-22 | Tilting pad thrust bearing capable of detecting axial force of rotary machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710725598.4A CN107327474B (en) | 2017-08-22 | 2017-08-22 | Tilting pad thrust bearing capable of detecting axial force of rotary machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107327474A CN107327474A (en) | 2017-11-07 |
| CN107327474B true CN107327474B (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710725598.4A Active CN107327474B (en) | 2017-08-22 | 2017-08-22 | Tilting pad thrust bearing capable of detecting axial force of rotary machine |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238543A (en) * | 2018-08-01 | 2019-01-18 | 沈阳工业大学 | Centrifugal compressor axial thrust-measuring device and measurement method |
| JP7338936B2 (en) | 2019-06-06 | 2023-09-05 | ニデックドライブテクノロジー株式会社 | Torque detection sensor and power transmission |
| CN112729680B (en) * | 2020-12-17 | 2023-03-28 | 浙江翰德圣智能再制造技术有限公司 | Multifunctional core rod for dynamic balance of impeller |
| CN113236677B (en) * | 2021-05-28 | 2022-09-09 | 重庆水泵厂有限责任公司 | Bearing cooling and lubricating system and method |
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| US3033031A (en) * | 1959-07-27 | 1962-05-08 | Waukesha Bearings Corp | Tilting pad type thrust bearings having integral means for measuring thrust loads |
| US3971602A (en) * | 1975-06-25 | 1976-07-27 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Thrust bearing |
| GB2074254A (en) * | 1980-04-18 | 1981-10-28 | Rolls Royce | Bearings |
| CN85200159U (en) * | 1985-04-01 | 1985-10-10 | 沈阳潜水泵厂 | Asbestos-iron guide bearing and its friction sheet of thrust plate |
| DE10059196A1 (en) * | 2000-11-29 | 2002-06-13 | Sartorius Gmbh | Axial bearing for rotating shaft with hydrodynamic lubrication comprises base ring with radial bearing segments fitted with piston and cylinder units fed from external fluid source, allowing their positions to be adjusted |
| DE102004048633A1 (en) * | 2004-10-06 | 2006-04-20 | Fag Kugelfischer Ag & Co. Ohg | Adjustment or calibration device for sensor bearing(s) has force, temperature, sound in solids sensors, signal preprocessing arrangement with signal connection to electronic storage/computing unit of adjustment and calibration device |
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| DE102006049516B3 (en) * | 2006-10-20 | 2008-01-03 | Atlas Copco Energas Gmbh | Turbo-engine, e.g. for operating as turbo-compressor, has a rotor with radial and axial bearings in a casing with a shaft and a rotor disk fastened on the shaft |
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| CN102691721B (en) * | 2012-06-07 | 2014-12-03 | 上海大隆机器厂有限公司 | Tilting pad thrust bearing for twin-screw compressor |
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2017
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| GB2074254A (en) * | 1980-04-18 | 1981-10-28 | Rolls Royce | Bearings |
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| DE10059196A1 (en) * | 2000-11-29 | 2002-06-13 | Sartorius Gmbh | Axial bearing for rotating shaft with hydrodynamic lubrication comprises base ring with radial bearing segments fitted with piston and cylinder units fed from external fluid source, allowing their positions to be adjusted |
| DE102004048633A1 (en) * | 2004-10-06 | 2006-04-20 | Fag Kugelfischer Ag & Co. Ohg | Adjustment or calibration device for sensor bearing(s) has force, temperature, sound in solids sensors, signal preprocessing arrangement with signal connection to electronic storage/computing unit of adjustment and calibration device |
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| CN204140646U (en) * | 2014-08-07 | 2015-02-04 | 大连液力机械有限公司 | With the tilting bush thrust slide bearing of nozzle |
| CN205001376U (en) * | 2015-08-13 | 2016-01-27 | 福斯流体控制（苏州）有限公司 | But bearing made of baked clay that inclines of remaining axial force of on -line monitoring pump |
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| CN107327474A (en) | 2017-11-07 |
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