CN115235767B - Fulcrum fixing device for connecting rod type spindle test - Google Patents
Fulcrum fixing device for connecting rod type spindle test Download PDFInfo
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- CN115235767B CN115235767B CN202210885380.6A CN202210885380A CN115235767B CN 115235767 B CN115235767 B CN 115235767B CN 202210885380 A CN202210885380 A CN 202210885380A CN 115235767 B CN115235767 B CN 115235767B
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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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Abstract
The application belongs to the field of aero-engine spindle test devices, and particularly relates to a connecting rod type pivot fixing device for spindle tests, which is provided with a flange edge and a central hole, wherein the central hole is sleeved on a spindle test piece and is positioned on the flange edge; the connecting rod assemblies comprise first connecting rods, second connecting rods and connecting sleeves for connecting the first connecting rods and the second connecting rods, the connecting sleeves are provided with internal threads, the first connecting rods are provided with first external threads at the ends connected with the connecting sleeves, the second connecting rods are provided with second external threads at the ends connected with the connecting sleeves, and the first external threads and the second external threads are connected with the internal threads of the connecting sleeves; the device comprises at least two fixing rods, wherein the fixing rods are fixedly arranged on a main shaft tester upright post, and the other end of a connecting rod assembly is connected with the fixing rods; the fulcrum fixing device is simple in structure, small in space, convenient to center, and provided with a certain lateral supporting rigidity, and can meet the requirement of simultaneously applying torque and bending moment loads in a main shaft test.
Description
Technical Field
The application belongs to the field of aero-engine spindle test devices, and particularly relates to a fulcrum fixing device for spindle tests in a connecting rod form.
Background
The main shaft of an aircraft engine is a key part of the engine, and the reliability of the main shaft has important influence on the engine. When an engine is tested on a general test bed for a long time, the gyroscopic moment and the bending moment caused by maneuvering flight are difficult to be applied to a main shaft. Therefore, the fatigue life test and assessment of the main shaft are generally carried out on a tester.
The fixing mode of the main shaft on the tester directly influences the accuracy and the rationality of the application of the main shaft test load.
The fulcrum of the previous main shaft test is fixed on a tester by adopting a flat plate, if the main shaft needs to apply torque and bending moment loads at the same time, and the two loads need to be applied in a crossed manner, the original supporting structure brings certain difficulty for simultaneously applying the two loads.
Therefore, a fulcrum fixing device with a simple structure, a small space and a certain supporting rigidity is urgently needed for fixing the fulcrum of the spindle test.
Disclosure of Invention
In order to solve the above problems, the present application provides
A fulcrum fixing device for a spindle test in the form of a connecting rod includes:
the shaft sleeve is provided with a flange edge and a central hole positioned on the flange edge, and the shaft sleeve is sleeved on the main shaft test piece through the central hole;
the connecting device comprises a plurality of connecting rod assemblies, a flange and a connecting sleeve, wherein one end of each connecting rod assembly is connected to the flange, each connecting rod assembly comprises a first connecting rod, a second connecting rod and a connecting sleeve for connecting the first connecting rod and the second connecting rod, each connecting sleeve is provided with an internal thread, one end of each first connecting rod, which is connected with the corresponding connecting sleeve, is provided with a first external thread, one end of each second connecting rod, which is connected with the corresponding connecting sleeve, is provided with a second external thread, and the first external thread and the second external thread are both connected with the internal threads of the corresponding connecting sleeve;
the number of the fixing rods is at least two, each fixing rod is fixedly installed on the stand column of the spindle tester, and the other end of the connecting rod assembly is connected with the fixing rods.
Preferably, the first external thread and the second external thread have opposite thread directions, the internal thread of the connecting sleeve is matched with the thread directions of the first external thread and the second external thread, and when the connecting sleeve rotates, the connecting sleeve synchronously rotates in or rotates out relative to the first connecting rod and the second connecting rod.
Preferably, the fixed rod is provided with a connecting slide block, the connecting rod assembly is connected with the fixed rod through the connecting slide block, the connecting slide block is provided with a sliding groove, the long edge of the fixed rod is provided with a sliding rail, and the connecting slide block is in sliding connection with the sliding rail of the fixed rod through the sliding groove.
Preferably, the surface of the fixing rod is provided with a plurality of first positioning holes, the connecting sliding block is provided with a second positioning hole connected with the first positioning holes, and the first positioning holes and the second positioning holes are fixedly connected through fasteners, so that the connecting sliding block is fixed at the preset position of the fixing rod.
Preferably, two groove walls of the sliding groove of the connecting sliding block are provided with shaft holes, a gear is arranged through the shaft holes, a central shaft of the gear penetrates through the shaft holes, and a handle is formed on the outer wall surface of the connecting sliding block; a rack is arranged at the position corresponding to the slide rail of the fixed rod and meshed with the gear; the gear is rotated through the handle, and the relative position of the connecting sliding block and the fixed rod is adjusted.
Preferably, the fixing rod has a scale.
Preferably, the fixing rod further comprises a fixing strip and a sliding ruler with the sliding rail, and the scales are engraved on the sliding ruler; the fixing strip is fixedly connected to the stand column of the main shaft tester, the fixing strip is provided with a narrow-mouth groove, the sliding ruler is provided with a shape sliding table matched with the narrow-mouth groove, and the shape sliding table slides in from the end face of the narrow-mouth groove to connect the sliding ruler with the fixing strip through a sliding rail.
Preferably, the fixing strip is provided with a first pin hole, the sliding ruler is provided with a second pin hole, and the fixing pin penetrates through the first pin hole and the second pin hole to realize the positioning of the fixing strip and the sliding ruler.
Preferably, the connecting rod assembly is hinged with the shaft sleeve through a lug, and the connecting rod assembly is hinged with the fixed rod through the lug.
Preferably, the handle has a pin hole through which the pin is passed to stop rotation of the handle.
The advantages of the present application include: the utility model provides a simple structure, the space is small and exquisite, make things convenient for the aligning, have the fulcrum fixing device of certain side direction support rigidity, can satisfy and exert moment of torsion and moment of flexure load simultaneously in the main shaft test, simultaneously, through the gear that link block has, can finely tune the device connection, the slide rule can carry out the coarse tuning with the fixed strip, realizes the quick location of the main shaft test piece on the axle sleeve.
Drawings
FIG. 1 is a schematic view of a preferred embodiment of a fulcrum mount of the present application;
fig. 2 is a schematic view of a fixing rod according to embodiment 1 of the present application;
FIG. 3 is a schematic view of a sleeve according to embodiment 1 of the present application;
FIG. 4 is a schematic view of the coupling sleeve of the present application.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. 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 some, but not all embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application, and should not be construed as limiting the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the drawings.
Example 1:
as shown in fig. 1 to 4, a fulcrum fixing device for a spindle test in the form of a connecting rod comprises a shaft sleeve 3 having a flange edge and a central hole which is sleeved on a spindle test piece and is positioned on the flange edge; the connecting rod assemblies 1 comprise a first connecting rod, a second connecting rod and a connecting sleeve 2 for connecting the first connecting rod and the second connecting rod, the connecting sleeve 2 is provided with an internal thread, the first connecting rod is provided with a first external thread at the connecting end with the connecting sleeve 2, the second connecting rod is provided with a second external thread at the connecting end with the connecting sleeve 2, and the first external thread and the second external thread are both connected with the internal thread of the connecting sleeve 2; the device comprises at least two fixing rods 4, the fixing rods 4 are fixedly arranged on a stand column of a spindle tester, the other end of a connecting rod assembly 1 is connected with the fixing rods 4, one end of a general spindle test piece is fixed, the other end of the general spindle test piece is sleeved by a shaft sleeve 3 and is connected, adjusted and fixed through the connecting rod assembly 1, the screwing directions of first external threads and second external threads are opposite, internal threads of a sleeve of a connecting sleeve 2 are matched with the first external threads and the second external threads, and when the connecting sleeve 2 rotates, the connecting sleeve 2 keeps synchronously screwing in or screwing out relative to a first connecting rod and a second connecting rod, in addition, a radial through hole penetrating through the connecting sleeve 2 is formed in the middle of the connecting sleeve 2, and when the connecting sleeve 2 is screwed in or screwed out, a rod-shaped tool can be inserted into the radial through hole to rotate, so that torque can be increased; the fixing rod 4 is provided with a connecting slide block 41, the connecting rod assembly 1 is connected with the fixing rod 4 through the connecting slide block 41, the connecting slide block 41 is provided with a sliding groove, the long edge of the fixing rod 4 is provided with a sliding rail, the connecting slide block 41 is connected with the sliding rail of the fixing rod 4 through the sliding groove in a sliding mode, the surface of the fixing rod 4 is provided with a plurality of first positioning holes, the connecting slide block 41 is provided with a second positioning hole connected with the first positioning holes, the first positioning holes and the second positioning holes are connected and fixed through fasteners, the connecting slide block 41 is fixed at the preset position of the fixing rod 4, the connecting slide block 41 slides on the fixing rod 4, and the position of the connecting slide block 41 can be adjusted.
Example 2: a fulcrum fixing device for a spindle test in a connecting rod form comprises a shaft sleeve 3, a connecting rod and a fixing device, wherein the shaft sleeve 3 is provided with a flange edge and a central hole which is sleeved on a spindle test piece and is positioned on the flange edge; the connecting rod assemblies 1 comprise a first connecting rod, a second connecting rod and a connecting sleeve 2 for connecting the first connecting rod and the second connecting rod, the connecting sleeve 2 is provided with an internal thread, the first connecting rod is provided with a first external thread at the connecting end with the connecting sleeve 2, the second connecting rod is provided with a second external thread at the connecting end with the connecting sleeve 2, and the first external thread and the second external thread are both connected with the internal thread of the connecting sleeve 2; the device comprises at least two fixing rods 4, the fixing rods 4 are fixedly arranged on a stand column of a spindle tester, the other end of a connecting rod assembly 1 is connected with the fixing rods 4, one end of a general spindle test piece is fixed, the other end of the general spindle test piece is sleeved by a shaft sleeve 3 and is connected, adjusted and fixed through the connecting rod assembly 1, the screwing directions of first external threads and second external threads are opposite, internal threads of a sleeve of a connecting sleeve 2 are matched with the screwing directions of the first external threads and the second external threads, the connecting sleeve 2 is synchronously screwed in or screwed out with a first connecting rod and a second connecting rod when the connecting sleeve 2 rotates, in addition, a radial through hole penetrating through the connecting sleeve 2 is formed in the middle of the connecting sleeve 2, and when the connecting sleeve 2 is screwed in or screwed out, a rod-shaped tool can be inserted into the radial through hole to rotate, so that torque can be increased; the fixing rod 4 is provided with a connecting slide block 41, the connecting rod assembly 1 is connected with the fixing rod 4 through the connecting slide block 41, the connecting slide block 41 is provided with a sliding groove, the long edge of the fixing rod 4 is provided with a sliding rail, the connecting slide block 41 is connected with the sliding rail of the fixing rod 4 through the sliding groove in a sliding manner, two groove walls of the sliding groove of the connecting slide block 41 are provided with shaft holes, a gear is installed through the shaft holes, a central shaft of the gear penetrates through the shaft holes, and a handle is formed on the outer wall surface of the connecting slide block 41; the handle is provided with a pin hole, the pin can stop the rotation of the handle through the pin hole, and a rack is arranged at the position corresponding to the sliding rail of the fixed rod 4 and is meshed with the gear; the gear is rotated through the handle, the relative position of the connecting sliding block 41 and the fixed rod 4 is adjusted, the fixed rod 4 further comprises a fixed strip 43 and a sliding ruler 42 with the sliding rail, and the scales are marked on the sliding ruler 42; fixed strip 43 fixed connection is on main shaft tester stand, and fixed strip 43 has the slot, and slide rule 42 has the shape slip table that the slot matches, the shape slip table is followed slot terminal surface slides in, makes slide rule 42 and fixed strip 43 sliding rail connection, and fixed strip 43 has first pinhole, and slide rule 42 has the second pinhole, and fixed pin 44 passes first pinhole and second pinhole connection, realizes fixed strip 43 and slide rule 42's location, through the gear that link block 41 has, can finely tune the device connection, and slide rule 42 and fixed strip 43 can carry out the coarse adjustment, realize the quick location of the main shaft test piece on the axle sleeve 3.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (4)
1. A fulcrum fixing device for a spindle test in the form of a connecting rod is characterized by comprising:
the spindle testing device comprises a spindle sleeve (3) and a testing device, wherein the spindle sleeve (3) is provided with a flange edge and a central hole positioned on the flange edge, and the spindle sleeve (3) is sleeved on a spindle testing piece through the central hole;
one end of each connecting rod assembly (1) is connected to the flange edge, each connecting rod assembly (1) comprises a first connecting rod, a second connecting rod and a connecting sleeve (2) for connecting the first connecting rod and the second connecting rod, the connecting sleeve (2) is provided with an internal thread, the first connecting rod is provided with a first external thread at one end connected with the connecting sleeve (2), the second connecting rod is provided with a second external thread at one end connected with the connecting sleeve (2), and the first external thread and the second external thread are both connected with the internal thread of the connecting sleeve (2);
the number of the fixing rods (4) is at least two, each fixing rod (4) is fixedly arranged on an upright post of the main shaft tester, and the other end of the connecting rod assembly (1) is connected with the fixing rods (4);
the thread turning directions of the first external thread and the second external thread are opposite, the internal thread of the connecting sleeve (2) is matched with the thread turning directions of the first external thread and the second external thread, and when the connecting sleeve (2) rotates, the connecting sleeve (2) keeps synchronously screwing in or screwing out relative to the first connecting rod and the second connecting rod;
the fixing rod (4) is provided with a connecting sliding block (41), the connecting rod assembly (1) is connected with the fixing rod (4) through the connecting sliding block (41), the connecting sliding block (41) is provided with a sliding groove, the long edge of the fixing rod (4) is provided with a sliding rail, and the connecting sliding block (41) is connected with the sliding rail of the fixing rod (4) in a sliding mode through the sliding groove;
the surface of the fixed rod (4) is provided with a plurality of first positioning holes, the connecting sliding block (41) is provided with a second positioning hole connected with the first positioning holes, and the first positioning holes and the second positioning holes are fixedly connected through fasteners so that the connecting sliding block (41) is fixed at the preset position of the fixed rod (4);
two groove walls of the sliding groove of the connecting sliding block (41) are provided with shaft holes, a gear is arranged through the shaft holes, a central shaft of the gear penetrates through the shaft holes, and a handle is formed on the outer wall surface of the connecting sliding block (41); a rack is arranged at the position corresponding to the sliding rail of the fixed rod (4), and the rack is meshed with the gear; the gear is rotated through the handle, and the relative position of the connecting sliding block (41) and the fixed rod (4) is adjusted;
the fixed rod (4) is provided with scales; the fixing rod (4) further comprises a fixing strip (43) and a sliding ruler (42) with the sliding rail, and scales are engraved on the sliding ruler (42); fixed strip (43) fixed connection is on main shaft tester stand, and fixed strip (43) have the slot, and slide ruler (42) have the shape slip table that the slot matches, the shape slip table is followed the slot terminal surface slides in, makes slide ruler (42) and fixed strip (43) sliding connection.
2. The fulcrum-fixing device for spindle testing in the form of a connecting rod as set forth in claim 1, wherein the fixing bar (43) has a first pin hole, the slide (42) has a second pin hole, and the fixing pin (44) passes through the first pin hole and the second pin hole to position the fixing bar (43) and the slide (42).
3. The fulcrum test fulcrum fixing device of the connecting rod type as claimed in claim 1, wherein the connecting rod assembly (1) is hinged to the bushing (3) through a tab, and the connecting rod assembly (1) is hinged to the fixing rod (4) through a tab.
4. The fulcrum-fixing device for testing a spindle in the form of a connecting rod according to claim 1, wherein the handle has a pin hole through which a pin is passed to stop the rotation of the handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210885380.6A CN115235767B (en) | 2022-07-26 | 2022-07-26 | Fulcrum fixing device for connecting rod type spindle test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210885380.6A CN115235767B (en) | 2022-07-26 | 2022-07-26 | Fulcrum fixing device for connecting rod type spindle test |
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| Publication Number | Publication Date |
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| CN115235767A CN115235767A (en) | 2022-10-25 |
| CN115235767B true CN115235767B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210885380.6A Active CN115235767B (en) | 2022-07-26 | 2022-07-26 | Fulcrum fixing device for connecting rod type spindle test |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1100514A1 (en) * | 1983-03-21 | 1984-06-30 | Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт Редукторостроения | Stand for testing reduction gear |
| CN101368874A (en) * | 2008-09-26 | 2009-02-18 | 成都发动机（集团）有限公司 | Testing device for implementing main torque and vibrating torque to high speed rotary main shaft |
| DE102012022661A1 (en) * | 2012-11-21 | 2014-05-22 | Imo Holding Gmbh | TITLE - Vane drive or worm gear system for use in e.g. vehicle, has shaft separated from housing, and terminal element providing alternative or supplementary even measured variables for sensor system |
| CN105136443A (en) * | 2015-09-18 | 2015-12-09 | 中国航空工业集团公司沈阳发动机设计研究所 | Blade twist test device |
| CN105547809A (en) * | 2016-01-05 | 2016-05-04 | 山东大学 | ECC axial tension test deformation monitoring system and method |
| CN207881939U (en) * | 2018-01-31 | 2018-09-18 | 西安工业大学 | A kind of circumferentially fixed loading test device of air supporting hydrostatic spindle |
| JP2019070555A (en) * | 2017-10-06 | 2019-05-09 | 公益財団法人鉄道総合技術研究所 | Method for measuring lateral pressure by axle |
| CN110895194A (en) * | 2019-11-07 | 2020-03-20 | 天津航天瑞莱科技有限公司 | Engine shafting rigidity simulation and loading precision control device |
| CN112880993A (en) * | 2021-01-18 | 2021-06-01 | 中国航发沈阳发动机研究所 | Loading device and method for static force and fatigue test load of main shaft of aircraft engine |
| CN113639977A (en) * | 2021-07-26 | 2021-11-12 | 中信戴卡股份有限公司 | Double-spindle machining center fixture simulation test bed |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10598567B1 (en) * | 2018-03-15 | 2020-03-24 | Dalian University Of Technology | Multi-bolt loosening test machine for flange with tension, bending and torsion compound loading |
-
2022
- 2022-07-26 CN CN202210885380.6A patent/CN115235767B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1100514A1 (en) * | 1983-03-21 | 1984-06-30 | Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт Редукторостроения | Stand for testing reduction gear |
| CN101368874A (en) * | 2008-09-26 | 2009-02-18 | 成都发动机（集团）有限公司 | Testing device for implementing main torque and vibrating torque to high speed rotary main shaft |
| DE102012022661A1 (en) * | 2012-11-21 | 2014-05-22 | Imo Holding Gmbh | TITLE - Vane drive or worm gear system for use in e.g. vehicle, has shaft separated from housing, and terminal element providing alternative or supplementary even measured variables for sensor system |
| CN105136443A (en) * | 2015-09-18 | 2015-12-09 | 中国航空工业集团公司沈阳发动机设计研究所 | Blade twist test device |
| CN105547809A (en) * | 2016-01-05 | 2016-05-04 | 山东大学 | ECC axial tension test deformation monitoring system and method |
| JP2019070555A (en) * | 2017-10-06 | 2019-05-09 | 公益財団法人鉄道総合技術研究所 | Method for measuring lateral pressure by axle |
| CN207881939U (en) * | 2018-01-31 | 2018-09-18 | 西安工业大学 | A kind of circumferentially fixed loading test device of air supporting hydrostatic spindle |
| CN110895194A (en) * | 2019-11-07 | 2020-03-20 | 天津航天瑞莱科技有限公司 | Engine shafting rigidity simulation and loading precision control device |
| CN112880993A (en) * | 2021-01-18 | 2021-06-01 | 中国航发沈阳发动机研究所 | Loading device and method for static force and fatigue test load of main shaft of aircraft engine |
| CN113639977A (en) * | 2021-07-26 | 2021-11-12 | 中信戴卡股份有限公司 | Double-spindle machining center fixture simulation test bed |
Non-Patent Citations (2)
| Title |
|---|
| 李明.超高速磨床主轴系统动态特性仿真分析与实验研究.《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》.2015,全文. * |
| 米建平.航空发动机主轴试验器结构特点分析.《燃气涡轮试验与研究》.(第04期),全文. * |
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