CN107907333B - Cylindrical elastic bearing fatigue test device - Google Patents
Cylindrical elastic bearing fatigue test device Download PDFInfo
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- CN107907333B CN107907333B CN201711231027.1A CN201711231027A CN107907333B CN 107907333 B CN107907333 B CN 107907333B CN 201711231027 A CN201711231027 A CN 201711231027A CN 107907333 B CN107907333 B CN 107907333B
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- elastic bearing
- cylindrical elastic
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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
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
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Abstract
The invention provides a cylindrical elastic bearing fatigue test device, which belongs to the technical field of fatigue tests and comprises a mandrel (3), wherein the mandrel is fixedly connected with an inner ring of a cylindrical elastic bearing, and a double-fork lug joint (12) extending towards the side edge is arranged at the end part of the mandrel; the loading joint (4) is provided with a single lug and is sleeved on the outer ring of the cylindrical elastic bearing; the anti-twisting seat (5) is provided with a strip-shaped groove and is used for limiting the movement direction of the square plate on the side edge of the cylindrical elastic bearing; a first actuator (8) connected to the double-wishbone joint (12); and the second actuator (17) is connected with the loading joint (4), and the motion direction of the actuating cylinder of the second actuator is consistent with the trend of the strip-shaped groove. The invention meets the loading requirement of the variable pitch motion of the durability fatigue test of the cylindrical elastic bearing through the design of the anti-torsion seat, the flat key, the double-fork lug joint, the sleeve shaft and the like, the whole test device is simple and convenient to disassemble and assemble, the loading is accurate and reliable, and the device can be used for performing the durability fatigue test of the cylindrical elastic bearing.
Description
Technical Field
The invention relates to the technical field of fatigue tests, in particular to a cylindrical elastic bearing fatigue test device.
Background
Cylindrical elastomeric bearings are the key elastomeric elements of a rotor that primarily carry radial loads from the blades and provide pitch-varying motion of the blades. In order to determine the fatigue failure mode and fatigue danger parts of the main-paddle cylindrical elastic bearing and the endurance fatigue life of the main-paddle cylindrical elastic bearing, an endurance fatigue test is performed on the cylindrical elastic bearing.
The existing test equipment can not meet the loading requirement of the durability fatigue test of the cylindrical elastic bearing of the main propeller.
Disclosure of Invention
In order to solve the problems, the invention provides a cylindrical elastic bearing fatigue test device which meets the loading requirement of a durability fatigue test of a main-propeller cylindrical elastic bearing, and can determine a fatigue failure mode, a fatigue dangerous part and a durability fatigue life by carrying out the durability fatigue test on the cylindrical elastic bearing.
The invention relates to a cylindrical elastic bearing fatigue test device, which comprises:
the mandrel is fixedly connected with the inner ring of the cylindrical elastic bearing, and a double-fork lug joint extending towards the side edge is arranged at the end part of the mandrel;
the loading joint is provided with a single lug and is sleeved on the outer ring of the cylindrical elastic bearing;
the anti-twisting seat is provided with a strip-shaped groove and is used for limiting the movement direction of the square plate on the side edge of the cylindrical elastic bearing;
the first actuator is connected with the double-fork lug joint; and the number of the first and second groups,
and the second actuator is connected with the loading joint, and the motion direction of the actuating cylinder of the second actuator is consistent with the trend of the strip-shaped groove.
Preferably, a displacement sensor and a first load cell are provided between the first actuator and the double wishbone joint.
Preferably, a second load cell is disposed between the second actuator and the load joint.
Preferably, a sleeve shaft is fixed at the end part of the mandrel, a hole is formed in the axial side edge of the sleeve, one end of the double-fork lug joint is fittingly installed in the hole in the side edge of the sleeve shaft, and the other end of the double-fork lug joint extends towards the end part of the first actuating cylinder to form a double-lug structure.
Preferably, the anti-twisting device further comprises a first supporting seat and a second supporting seat which are provided with through holes, bearings are arranged in the through holes and used for supporting two ends of the mandrel and are in rotary connection with the mandrel, and the anti-twisting seat and the cylindrical elastic bearing are arranged between the first supporting seat and the second supporting seat.
Preferably, the diameter of the mandrel at the through hole passing through the first bearing block or the second bearing block is larger than the diameter of the mandrel at other positions.
Preferably, the mandrel and the cylindrical elastic bearing inner ring are connected through a flat key.
The invention has the advantages that the design of the first supporting seat, the second supporting seat and the loading joint meets the loading requirement of the radial load of the endurance fatigue test of the cylindrical elastic bearing, the design of the anti-twist seat, the flat key, the double-fork ear joint, the sleeve shaft and the like meets the loading requirement of the variable pitch motion of the endurance fatigue test of the cylindrical elastic bearing, the whole test device is simple and convenient to disassemble and assemble, the loading is accurate and reliable, and the device can be used for carrying out the endurance fatigue test of the cylindrical elastic bearing.
Drawings
Fig. 1 is a schematic view of the installation of a preferred embodiment of a cylindrical elastic bearing fatigue test apparatus according to the present invention.
Fig. 2 is a front view of the embodiment of the invention shown in fig. 1.
Fig. 3 is a schematic view of a supporting seat structure according to the embodiment of the invention shown in fig. 1.
FIG. 4 is an enlarged view of the sleeve of FIG. 1 according to the embodiment of the present invention.
The device comprises a mounting rack 1, a first supporting seat 2, a mandrel 3, a loading joint 4, an anti-twisting seat 5, a second supporting seat 6, a displacement sensor 7, a first actuator 8, a portal frame 9, a first force measuring sensor 10, a single-lug end 11, a double-fork-lug joint 12, a sleeve 13, a flat key 14, a cylindrical elastic bearing 15, a second force measuring sensor 16 and a second actuator 17.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, such as "clockwise," "counterclockwise," "upward," "downward," and the like, merely for the convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the invention.
The invention provides a cylindrical elastic bearing fatigue test device, which mainly comprises the following components in reference to figures 1 and 2:
the mandrel 3 is fixedly connected with the inner ring of the cylindrical elastic bearing, and a double-fork lug joint 12 extending towards the side edge is arranged at the end part;
the loading joint 4 is provided with a single lug and is sleeved on the outer ring of the cylindrical elastic bearing;
the anti-twisting seat 5 is provided with a strip-shaped groove and is used for limiting the movement direction of the square plate on the side edge of the cylindrical elastic bearing;
a first actuator 8 connected to the double-fork ear joint 12; and the number of the first and second groups,
and the second actuator 17 is connected with the loading joint 4, and the motion direction of an actuator cylinder of the second actuator is consistent with the trend of the strip-shaped groove.
The loading requirement of the variable pitch motion of the bearing cylindrical elastic bearing durability fatigue test is met through the first actuator 8 and the second actuator 17, wherein the first actuator 8 provides a rotating load, and the second actuator 17 provides a side load.
Referring to fig. 1 and 2, the cylindrical elastic bearing 15 includes an inner ring and an outer ring, the mandrel 3 passes through the inner ring and is fixedly connected with the inner ring, for example, by a flat key 14, the fatigue testing device for the cylindrical elastic bearing further includes a first supporting seat 2 and a second supporting seat 6 having a through hole, a bearing is disposed in the through hole, the bearing is used for supporting two ends of the mandrel 4 and is rotatably connected with the mandrel 4, and the anti-twisting seat 5 and the cylindrical elastic bearing are disposed between the first supporting seat 2 and the second supporting seat 6.
Roller bearings are arranged between the first supporting seat 2 and the second supporting seat 6 and between the second supporting seat 6 and the sleeve shaft 13, grooves are formed in the inner surfaces of the holes of the first supporting seat 2 and the second supporting seat 6 and used for installing elastic check rings and fixing the outer ring of the bearing, and the first supporting seat 2 and the second supporting seat 6 are fixed on the surface of the upper flat plate of the installing rack 1 through bolts.
In this embodiment, the mounting rack 1 is a fixing platform of the testing device, all other testing components are mounted on the mounting rack, the upper flat plate is fixedly provided with a first supporting seat 2, an anti-twisting seat 5, a second supporting seat 6 and a portal frame 9, the lower flat plate is fixedly connected with a double-fork structure, and one end of a second actuator 17 can be fixed through the single-fork structure.
In this embodiment, the gantry 9 is used for fixing the first actuator cylinder 8, specifically, the first actuator cylinder 8 is hung upside down on the gantry 9, the root of the first actuator cylinder is fixed to a beam at the top end of the gantry 9, and the displacement sensor 7 and the first load cell 10 are arranged between the first actuator cylinder 8 and the double-fork lug joint 12. Referring to fig. 1, a first load cell 10 is connected to a first ram 8, and a displacement sensor 7 is connected to the rod of the first ram 8.
Similarly, referring to fig. 2, a second load cell 16 is disposed between the second actuator 17 and the load joint 4.
Referring to fig. 3 and 4, a sleeve shaft 13 is fixed at an end of the mandrel 3, the sleeve shaft 13 is provided with a hole towards a side edge, one end of the double-fork lug joint 12 is fittingly installed in the hole of the side edge of the sleeve shaft 13, and the other end of the double-fork lug joint extends towards the end of the first actuating cylinder 8 to form a double-lug structure.
It will be appreciated that the double lug joint 12 is provided on the side of the mandrel via a quill 13 to connect the single lug ends of the first ram 8 so that extension of the first ram 8 will twist the mandrel.
In this embodiment, the diameter of the mandrel 3 at the through hole passing through the first support seat 2 or the second support seat 6 is larger than that at other positions of the mandrel 3, so as to enhance the supporting strength. The mandrel 3 is a stepped shaft, the excircle of the large end on the left side is provided with a groove for installing an elastic check ring and fixing the inner ring of the bearing, the small end on the right side is designed into a square structure with a fillet and is provided with a threaded hole vertical to the axis, the threaded hole is connected with the sleeve shaft 13 and then fixed by a bolt, the sleeve shaft 13 is of a sleeve type structure, the center of the sleeve shaft is a square hole with a fillet, and the excircle on one side of the middle part is flattened and is provided with a hole so as to be matched with the small end of the mandrel 3 and then fixed by a bolt; a groove is formed in the excircle of one end of the bearing, and is used for installing an elastic check ring and fixing the inner ring of the bearing; the excircle of the other end is cut flat and then is provided with a through hole for installing the double-fork lug joint 12.
In this embodiment, the anti-twisting seat 5 is a support structure, one side of which is provided with a vertical groove structure, and can be matched with a square plate structure of the cylindrical elastic bearing 15, a through hole is formed in the horizontal direction for installing the mandrel 3, and the anti-twisting seat 5 is fixed on the surface of the upper flat plate of the installing rack 1 through a bolt.
The invention has the advantages that the design of the first supporting seat, the second supporting seat and the loading joint meets the loading requirement of the radial load of the endurance fatigue test of the cylindrical elastic bearing, the design of the anti-twist seat, the flat key, the double-fork ear joint, the sleeve shaft and the like meets the loading requirement of the variable pitch motion of the endurance fatigue test of the cylindrical elastic bearing, the whole test device is simple and convenient to disassemble and assemble, the loading is accurate and reliable, and the device can be used for carrying out the endurance fatigue test of the cylindrical elastic bearing.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. The utility model provides a cylindricality elastic bearing fatigue test device which characterized in that includes:
the mandrel (3) is fixedly connected with the inner ring of the cylindrical elastic bearing, and a double-fork lug joint (12) extending towards the side edge is arranged at the end part of the mandrel;
the loading joint (4) is provided with a single lug and is sleeved on the outer ring of the cylindrical elastic bearing;
the anti-twisting seat (5) is provided with a strip-shaped groove and is used for limiting the movement direction of the square plate on the side edge of the cylindrical elastic bearing;
a first actuator (8) connected to the double-wishbone joint (12); and the number of the first and second groups,
the second actuator (17) is connected with the loading joint (4), and the motion direction of the actuating cylinder of the second actuator is consistent with the trend of the strip-shaped groove;
a sleeve shaft (13) is fixed at the end part of the mandrel (3), a hole is formed in the sleeve shaft (13) towards the side edge, one end of a double-fork lug joint (12) is installed in the hole in the side edge of the sleeve shaft (13) in a matched mode, and the other end of the double-fork lug joint extends towards the end part of the first actuating cylinder to form a double-lug structure;
the fatigue test device for the cylindrical elastic bearing further comprises a first supporting seat (2) and a second supporting seat (6) which are provided with through holes, bearings are arranged in the through holes, are used for supporting two ends of the mandrel (3) and are rotationally connected with the mandrel (3), and the anti-torsion seat (5) and the cylindrical elastic bearing are arranged between the first supporting seat (2) and the second supporting seat (6);
the mandrel (3) is connected with the cylindrical elastic bearing inner ring through a flat key (14).
2. A cylindrical elastic bearing fatigue test device according to claim 1, wherein a displacement sensor (7) and a first load cell (10) are arranged between the first actuator (8) and the double wishbone joint (12).
3. A cylindrical elastic bearing fatigue test device according to claim 1, wherein a second load cell (16) is arranged between the second actuator (17) and the load connection (4).
4. A cylindrical elastic bearing fatigue test device according to claim 1, wherein the diameter of the spindle (3) at the through hole passing through the first bearing block (2) or the second bearing block (6) is larger than the diameter of the spindle (3) at other positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711231027.1A CN107907333B (en) | 2017-11-29 | 2017-11-29 | Cylindrical elastic bearing fatigue test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711231027.1A CN107907333B (en) | 2017-11-29 | 2017-11-29 | Cylindrical elastic bearing fatigue test device |
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| Publication Number | Publication Date |
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| CN107907333A CN107907333A (en) | 2018-04-13 |
| CN107907333B true CN107907333B (en) | 2020-02-21 |
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| CN201711231027.1A Active CN107907333B (en) | 2017-11-29 | 2017-11-29 | Cylindrical elastic bearing fatigue test device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044585B (en) * | 2019-03-05 | 2021-08-03 | 中国航发北京航空材料研究院 | Spherical spacer fatigue test device and test method |
| CN110702409B (en) * | 2019-09-29 | 2021-10-15 | 中国航发北京航空材料研究院 | Elastic joint bearing fatigue test device |
| CN112504675A (en) * | 2020-11-20 | 2021-03-16 | 中国直升机设计研究所 | Loading device for radial rigidity test of central elastic bearing |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19643936C1 (en) * | 1996-10-31 | 1998-01-29 | Cae Inst Fuer Produktentwicklu | Elastic bearing transfer function determination apparatus |
| KR20090093790A (en) * | 2008-02-29 | 2009-09-02 | 가부시키가이샤 사기노미야세이사쿠쇼 | Torque load test device |
| CN102221462A (en) * | 2011-06-13 | 2011-10-19 | 长春机械科学研究院有限公司 | Test detection device for joint bearing |
| CN202133547U (en) * | 2011-01-07 | 2012-02-01 | 西安交通大学 | Rolling bearing measuring device having comprehensive properties and high precision |
| CN103105296A (en) * | 2013-01-23 | 2013-05-15 | 南京理工大学 | Testing device for bearing dynamic characteristic parameters |
| CN104280241A (en) * | 2014-10-14 | 2015-01-14 | 合肥工业大学 | Helicopter rotor system elastic bearing load measuring device |
| CN204495559U (en) * | 2015-04-07 | 2015-07-22 | 中国直升机设计研究所 | A kind of resilient bearing torsional rigidity proving installation |
-
2017
- 2017-11-29 CN CN201711231027.1A patent/CN107907333B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19643936C1 (en) * | 1996-10-31 | 1998-01-29 | Cae Inst Fuer Produktentwicklu | Elastic bearing transfer function determination apparatus |
| KR20090093790A (en) * | 2008-02-29 | 2009-09-02 | 가부시키가이샤 사기노미야세이사쿠쇼 | Torque load test device |
| CN202133547U (en) * | 2011-01-07 | 2012-02-01 | 西安交通大学 | Rolling bearing measuring device having comprehensive properties and high precision |
| CN102221462A (en) * | 2011-06-13 | 2011-10-19 | 长春机械科学研究院有限公司 | Test detection device for joint bearing |
| CN103105296A (en) * | 2013-01-23 | 2013-05-15 | 南京理工大学 | Testing device for bearing dynamic characteristic parameters |
| CN104280241A (en) * | 2014-10-14 | 2015-01-14 | 合肥工业大学 | Helicopter rotor system elastic bearing load measuring device |
| CN204495559U (en) * | 2015-04-07 | 2015-07-22 | 中国直升机设计研究所 | A kind of resilient bearing torsional rigidity proving installation |
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| CN107907333A (en) | 2018-04-13 |
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