CN111006866A - Sliding bearing PV test loading mechanism - Google Patents
Sliding bearing PV test loading mechanism Download PDFInfo
- Publication number
- CN111006866A CN111006866A CN201911216704.1A CN201911216704A CN111006866A CN 111006866 A CN111006866 A CN 111006866A CN 201911216704 A CN201911216704 A CN 201911216704A CN 111006866 A CN111006866 A CN 111006866A
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- bearing
- sliding bearing
- test
- grinding shaft
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
Abstract
The invention discloses a sliding bearing PV test loading mechanism, which belongs to the technical field of sliding bearing frictional wear tests and comprises a bearing seat, a counter-grinding shaft, a sliding bearing sample, a cross-shaped coupling, a simply supported end supporting mechanism and a test bed; the sliding bearing sample and the bearing seat are assembled in an interference manner, the sliding bearing sample and the counter-grinding shaft are in clearance fit for counter-grinding, the counter-grinding shaft is connected with the motor driving shaft, and the motor driving shaft is responsible for transmitting torque; the lower end of the bearing seat is connected with a hydraulic ejector rod, and the tail end of the opposite grinding shaft is fixed on a test bed by a simple support end supporting mechanism. The test loading mechanism ensures the rigidity and the reliability of the rack under the condition of small diameter of the grinding shaft, and the tapered roller bearing has the axial thrust effect, so that the grinding shaft can be prevented from being ejected and falling off in the test process. The upright post, the motor and the main shaft supporting mechanism are fixed on the test bed. The invention has the advantages of simple structure, easy processing, convenient and fast disassembly and assembly, easy control of the fit clearance between the sliding bearing sample and the counter-grinding shaft, and good stability and reliability in the test.
Description
Technical Field
The invention belongs to the technical field of friction and wear tests of sliding bearings, and particularly relates to a PV test loading mechanism of a sliding bearing.
Background
Because the sliding bearing has the advantages of large bearing capacity, high running rotating speed, compact installation space and the like, the sliding bearing is more and more widely applied in the field of machinery, the PV test is an important test for measuring the performance of the sliding bearing and plays an important role in the selection, the test and the like of the sliding bearing, and a suitable test device is favorable for improving the test efficiency and the data precision.
The sliding bearing test sample piece loading modes of the standard sliding bearing PV testing machine and the non-standard PV testing machine provided by the supplier of the testing equipment in the current market are clearance assembly, the clearance assembly causes the inaccurate control of the fit clearance of the sliding bearing and the grinding shaft, the difference with the practical application is larger, and the clearance assembly mode needs an axial positioning step surface and a circumferential positioning boss, which causes the difficulty in disassembly and assembly and the low working rate.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention adopts an interference assembly mode which is consistent with practical application, the fit clearance of the sliding bearing and the opposite grinding shaft is controlled more accurately, and the test result is more credible. The new structure can realize the exchange of front and back, left and right, and reduce the dismounting error.
The invention is realized by the following technical scheme:
a sliding bearing PV test loading mechanism comprises a bearing seat 1, a counter-grinding shaft 3, a sliding bearing sample 2, a cross-shaped coupling 5, a simply supported end supporting mechanism and a test bed 10; the method comprises the following steps that a sliding bearing sample 2 and a bearing seat 1 are assembled in an interference fit mode, the sliding bearing sample 2 and a counter-grinding shaft 3 are in clearance fit for counter-grinding, the counter-grinding shaft 3 is connected with a motor driving shaft 14 through a cross-shaped coupling 5, the motor driving shaft 14 is connected with a driving motor 19, and the motor driving shaft 14 is responsible for transmitting torque; the lower end of the bearing seat 1 is connected with a hydraulic ejector rod 16, the hydraulic ejector rod 16 is connected with a hydraulic cylinder 17 and used for providing power, the hydraulic cylinder 17 is fixed on the test bed 10, and the tail end of the counter-grinding shaft 3 is fixed on the test bed 10 through a simple support end supporting mechanism.
Further, the bearing seat 1 is of a circular structure, a through hole structure is adopted in the middle of the bearing seat and is used for penetrating through the sliding bearing sample 2, a pressure-bearing cambered surface 12 is arranged on the outer surface of the circumference of the lower portion of the circular structure, and the pressure-bearing cambered surface 12 is an arc-shaped notch with a certain angle and is machined in an axial symmetry mode; the certain angle is 90-120 degrees.
Further, a bearing pressurizing module 15 is arranged between the lower end of the bearing seat 1 and the hydraulic ejector rod 16, a pressurizing arc surface 20 is arranged on the outer surface of the circumference of the upper part of the bearing pressurizing module 15, and the pressurizing arc surface 20 is embedded into the pressure-bearing arc surface 12 of the bearing seat 1; the diameter of the pressurizing arc surface 20 is the same as that of the pressure-bearing arc surface 12, and the included angle 22 of the pressurizing arc surface is smaller than the included angle 21 of the pressure-bearing arc surface.
Furthermore, a lubricating oil hole 9 and a temperature testing hole 11 are respectively formed in the radial direction of the bearing seat 1, the lubricating oil hole 9 is communicated with the sliding bearing sample 2, and lubricating oil with a certain pressure is provided for the sliding bearing sample when the test bench runs; the temperature test hole 11 is communicated with the sliding bearing sample 2 and used for installing a temperature sensor and collecting the temperature of the wall surface of the sliding bearing.
Further, the simple-supported end supporting mechanism is composed of a simple-supported end lower fixing frame 7, a simple-supported end upper fixing frame 6, a simple-supported end tapered roller bearing 8 and an installation upright post 13; the simple supporting end lower fixing frame 7 and the simple supporting end upper fixing frame 6 are both in a semicircular structure and are symmetrical up and down, and are screwed and fixed with the mounting upright post 13 at two lug positions of the simple supporting end lower fixing frame 7 and the simple supporting end upper fixing frame 6 through connecting bolts 18; a central circular hole formed by the simply-supported end lower fixing frame 7 and the simply-supported end upper fixing frame 6 is in interference fit with the outer edge of the tapered roller bearing 8 and is used for limiting the follow-up of the outer ring of the tapered roller bearing 8; the inner ring of the tapered roller bearing 8 is in interference fit with the tail end of the counter-grinding shaft 3, and the counter-grinding shaft 3 is simply supported.
Further, a connecting key 4 is arranged between the pair of grinding shafts 3 and the cross coupling 5; the matching surfaces of the cross coupling and the opposite grinding shaft are provided with certain inclination angles 23, so that the axial positioning function is realized, and the opposite grinding shaft is prevented from being connected and falling off; the inclination 23 is less than 5 ° with respect to the vertical.
Compared with the prior art, the invention has the following advantages:
the sliding bearing PV test loading mechanism ensures the rigidity and the reliability of a rack under the condition of small diameter of the counter-grinding shaft, and the counter-grinding shaft can be prevented from being ejected and falling off in the test process by adopting the tapered roller bearing with the axial thrust effect. The upright post, the motor and the main shaft supporting mechanism are fixed on the test bed. The invention has the advantages of simple structure, easy processing, convenient and fast disassembly and assembly, easy control of the fit clearance between the sliding bearing sample and the counter-grinding shaft, and good stability and reliability in the test.
Drawings
FIG. 1 is a schematic diagram of the PV test loading mechanism of the present invention;
FIG. 2 is a schematic view of the assembly of the bearing housing and fixture of the present invention;
FIG. 3 is a side view of the PV test loading mechanism of the present invention;
FIG. 4 is a partial cross-sectional view of a bearing housing pressure block;
FIG. 5 is a schematic view of the cross-coupling;
in the figure: 1-a bearing seat; 2-sliding bearing test sample; 3-grinding the shaft; 4-a connecting bond; 5-a cross coupling; 6-fixing the frame on the simply supporting end; 7-simply supporting the lower fixing frame at the end; 8-simply supported end tapered roller bearings; 9-lubricating oil holes; 10, a test bed; 11-temperature test wells; 12-pressure-bearing cambered surface; 13-mounting the upright post; 14-a motor drive shaft; 15-bearing seat pressing block; 16-hydraulic ejector rod; 17-a hydraulic cylinder; 18-connecting the bolt drive motor; 19-a drive motor; 20-pressing arc surface; 21-included angle of pressure-bearing cambered surface; 22-pressurization arc surface included angle; 23-cross coupling inclination.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Example 1
As shown in fig. 1 and 2, a sliding bearing PV test sample loading mechanism comprises a bearing seat 1 with a sliding bearing sample 2 arranged on the inner wall in an interference manner, wherein the bearing seat adopts a through hole structure, an axial positioning step surface and an axial positioning boss are not needed, and the sliding bearing sample 2 is assembled into the bearing seat 1 in a press-fit manner; wherein, a lubricating oil hole 9 is radially processed on the bearing seat 1 and is communicated with the sliding bearing sample 2, and the test bed provides lubricating oil with certain pressure for the sliding bearing sample 2 when in operation, so that a sufficiently thick oil film is formed between the counter-grinding shaft 3 and the sliding bearing sample 2; in order to collect the wall surface temperature of the sliding bearing sample 2 conveniently, a temperature test hole 11 is formed in the circumferential direction of the bearing seat 1 and communicated with the sliding bearing sample 2, and the test hole is used for installing a temperature sensor and collecting test data.
The outer surface of the circumference of the lower part of the bearing seat 1 is provided with a pressure-bearing cambered surface 12, and the pressure-bearing cambered surface is an arc-shaped notch with a certain angle and is generally processed in an axial symmetry manner. The bearing seat pressurizing module 15 is in contact with the pressure-bearing arc surface 12, the upper part of the bearing pressurizing module 15 is correspondingly provided with a pressurizing arc surface 20, the diameters of the pressurizing arc surface 20 and the pressure-bearing arc surface 12 are the same, the angle is slightly smaller than the pressure-bearing arc surface 12, the included angle 22 of the pressurizing arc surface is smaller than the included angle 21 of the pressure-bearing arc surface, and the thickness of the bearing seat pressurizing module 15 is larger than the processing depth of the pressure-; this structure can guarantee that pressurization module 15 fully imbeds bearing frame 1, and area of contact is enough big, reduces contact stress and guarantees to have sufficient frictional force between the two simultaneously, utilizes frictional force to carry out axial positioning to the bearing frame.
The sliding bearing sample 2 and the opposite grinding shaft 3 are oppositely ground in a designed clearance fit mode, the opposite grinding shaft 3 is connected with the motor driving shaft 14 through the cross-shaped coupler 5 and then driven to rotate by the motor, the rotation stability of the cross-shaped coupler 5 is good, the vibration is small, a certain inclination angle 23 is designed on the matching surface of the cross-shaped coupler and the opposite grinding shaft, the axial positioning function is achieved, the connection and falling of the opposite grinding shaft are prevented, and the inclination angle 23 is smaller than 5 degrees.
The tail end of the opposite grinding shaft 3 is supported by a simple supporting end mechanism consisting of a simple supporting end upper fixing frame 6, a simple supporting end lower fixing frame 7 and a tapered roller bearing 8, and the simple supporting end mechanism is indirectly supported on a test bed 10 through an installation upright post 13;
the lower fixed frame 7 of the simply supported end and the upper fixed frame 6 of the simply supported end adopt a split structure, thereby being beneficial to disassembly and assembly.
The simple supporting end supporting structure adopts the tapered roller bearing 8, has an axial thrust effect, and can prevent the counter-grinding shaft from being ejected and falling off in the test process.
In the operation process of the test loading mechanism, a hydraulic cylinder 17 applies load to a bearing seat pressurizing module 15 through a hydraulic ejector rod 16, the bearing seat pressurizing module 15 is in contact with a pressure-bearing cambered surface 12, the load is transmitted between a sliding bearing sample 2 and a counter-grinding shaft 3, and then PV tests of the sliding bearing sample 2 under different loads can be carried out.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (6)
1. A sliding bearing PV test loading mechanism is characterized by comprising a bearing seat (1), a counter-grinding shaft (3), a sliding bearing sample (2), a cross-shaped coupling (5), a simply supported end supporting mechanism and a test bed (10); the method comprises the following steps that a sliding bearing sample (2) and a bearing seat (1) are assembled in an interference mode, the sliding bearing sample (2) and a grinding shaft (3) are in clearance fit for grinding, the grinding shaft (3) and a motor driving shaft (14) are connected through a cross-shaped coupler (5), the motor driving shaft (14) is connected with a driving motor (19), and the motor driving shaft (14) is responsible for transmitting torque; the lower end of the bearing seat (1) is connected with a hydraulic ejector rod (16), the hydraulic ejector rod (16) is connected with a hydraulic cylinder (17) and used for providing power, the hydraulic cylinder (17) is fixed on the test bed (10), and the tail end of the grinding shaft (3) is fixed on the test bed (10) through a simple end supporting mechanism.
2. The sliding bearing PV test loading mechanism according to claim 1, characterized in that the bearing seat (1) is of a circular structure, a through hole structure is adopted in the middle for passing through the sliding bearing sample (2), the outer surface of the circumference of the lower part of the circular structure is provided with a pressure-bearing cambered surface (12), and the pressure-bearing cambered surface (12) is an arc-shaped notch with a certain angle and is processed in an axisymmetric manner; the certain angle is 90-120 degrees.
3. The sliding bearing PV test loading mechanism according to claim 2, characterized in that a bearing pressurizing module (15) is arranged between the lower end of the bearing seat (1) and the hydraulic ejector rod (16), the outer surface of the upper part of the circumference of the bearing pressurizing module (15) is provided with a pressurizing cambered surface (20), and the pressurizing cambered surface (20) is embedded into the pressure-bearing cambered surface (12) of the bearing seat (1); the diameter of the pressurizing arc surface (20) is the same as that of the pressure-bearing arc surface (12), and the included angle (22) of the pressurizing arc surface is smaller than that (21) of the pressure-bearing arc surface.
4. The sliding bearing PV test loading mechanism according to claim 1, characterized in that the bearing seat (1) is provided with a lubricating oil hole (9) and a temperature testing hole (11) respectively in the radial direction, the lubricating oil hole (9) is communicated with the sliding bearing sample (2), and the test bench provides lubricating oil with a certain pressure for the sliding bearing sample during operation; the temperature test hole (11) is communicated with the sliding bearing sample (2) and is used for installing a temperature sensor and collecting the temperature of the wall surface of the sliding bearing.
5. The sliding bearing PV test loading mechanism according to claim 1, characterized in that the simple end support mechanism is composed of a simple end lower fixing frame (7), a simple end upper fixing frame (6), a simple end tapered roller bearing (8) and a mounting column (13); the simple supporting end lower fixing frame (7) and the simple supporting end upper fixing frame (6) are both in a semicircular structure and are symmetrical up and down, and the two lugs of the simple supporting end lower fixing frame (7) and the simple supporting end upper fixing frame (6) are screwed and fixed with the mounting upright post (13) through connecting bolts (18); a central circular hole formed by the simply-supported end lower fixing frame (7) and the simply-supported end upper fixing frame (6) is in interference fit with the outer edge of the tapered roller bearing (8) and is used for limiting the follow-up of the outer ring of the tapered roller bearing (8); the inner ring of the tapered roller bearing (8) is in interference fit with the tail end of the counter-grinding shaft (3) to play a role in simply supporting the counter-grinding shaft (3).
6. A plain bearing PV test loading mechanism as claimed in claim 1, characterized in that a connecting key (4) is provided between the counter-grinding spindle (3) and the cross coupling (5); the matching surfaces of the cross coupling and the opposite grinding shaft are provided with certain inclination angles (23), so that the axial positioning function is realized, and the opposite grinding shaft is prevented from being connected and falling off; the inclination angle (23) is less than 5 ° with respect to the vertical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911216704.1A CN111006866A (en) | 2019-12-03 | 2019-12-03 | Sliding bearing PV test loading mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911216704.1A CN111006866A (en) | 2019-12-03 | 2019-12-03 | Sliding bearing PV test loading mechanism |
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| Publication Number | Publication Date |
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| CN111006866A true CN111006866A (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911216704.1A Pending CN111006866A (en) | 2019-12-03 | 2019-12-03 | Sliding bearing PV test loading mechanism |
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| CN (1) | CN111006866A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607317A (en) * | 2021-08-04 | 2021-11-05 | 大连理工大学 | Indirect measuring method and system for raceway contact stress |
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| CN1828264A (en) * | 2006-04-18 | 2006-09-06 | 燕山大学 | On-line measuring and testing machine for radial sliding bearing friction and wearing |
| CN104880316A (en) * | 2015-05-27 | 2015-09-02 | 西安交通大学 | Rolling bearing dynamic performance testing machine adopting dislocation tile sliding bearing to support |
| CN105352731A (en) * | 2015-12-17 | 2016-02-24 | 新昌县中瑞轴承厂 | Simulating checking mechanism for ball bearing |
| CN205352693U (en) * | 2015-12-17 | 2016-06-29 | 新昌县中瑞轴承厂 | Bearing retainer for ball bearing experiment machine |
| CN107860578A (en) * | 2017-10-18 | 2018-03-30 | 西南石油大学 | A kind of full-scale texturing drill bit sliding bearing experimental provision and method of testing |
| CN108318250A (en) * | 2018-05-03 | 2018-07-24 | 河南科技大学 | A kind of comprehensive test machine |
| CN207832446U (en) * | 2017-09-04 | 2018-09-07 | 浙江双飞无油轴承股份有限公司 | Sample sliding bearing PV testing machines easy to assemble |
| CN110057582A (en) * | 2019-05-23 | 2019-07-26 | 河南科技大学 | Hydrostatic bearing radial rigidity test device |
-
2019
- 2019-12-03 CN CN201911216704.1A patent/CN111006866A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1828264A (en) * | 2006-04-18 | 2006-09-06 | 燕山大学 | On-line measuring and testing machine for radial sliding bearing friction and wearing |
| CN104880316A (en) * | 2015-05-27 | 2015-09-02 | 西安交通大学 | Rolling bearing dynamic performance testing machine adopting dislocation tile sliding bearing to support |
| CN105352731A (en) * | 2015-12-17 | 2016-02-24 | 新昌县中瑞轴承厂 | Simulating checking mechanism for ball bearing |
| CN205352693U (en) * | 2015-12-17 | 2016-06-29 | 新昌县中瑞轴承厂 | Bearing retainer for ball bearing experiment machine |
| CN207832446U (en) * | 2017-09-04 | 2018-09-07 | 浙江双飞无油轴承股份有限公司 | Sample sliding bearing PV testing machines easy to assemble |
| CN107860578A (en) * | 2017-10-18 | 2018-03-30 | 西南石油大学 | A kind of full-scale texturing drill bit sliding bearing experimental provision and method of testing |
| CN108318250A (en) * | 2018-05-03 | 2018-07-24 | 河南科技大学 | A kind of comprehensive test machine |
| CN110057582A (en) * | 2019-05-23 | 2019-07-26 | 河南科技大学 | Hydrostatic bearing radial rigidity test device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607317A (en) * | 2021-08-04 | 2021-11-05 | 大连理工大学 | Indirect measuring method and system for raceway contact stress |
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Application publication date: 20200414 |
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