CN112985818A - Method capable of quantitatively applying uniform circumferential radial force - Google Patents

Method capable of quantitatively applying uniform circumferential radial force Download PDF

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Publication number
CN112985818A
CN112985818A CN202110439468.0A CN202110439468A CN112985818A CN 112985818 A CN112985818 A CN 112985818A CN 202110439468 A CN202110439468 A CN 202110439468A CN 112985818 A CN112985818 A CN 112985818A
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CN
China
Prior art keywords
test piece
wedge block
upper flange
flange test
taper
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202110439468.0A
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Chinese (zh)
Inventor
孙清超
郭钢毅
袁志伟
孙克鹏
赵斌斌
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Dalian University of Technology
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Dalian University of Technology
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Publication date
Application filed by Dalian University of Technology filed Critical Dalian University of Technology
Priority to CN202110439468.0A priority Critical patent/CN112985818A/en
Publication of CN112985818A publication Critical patent/CN112985818A/en
Withdrawn legal-status Critical Current

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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
    • G01M15/00—Testing of engines
    • G01M15/02—Details or accessories of testing apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/14—Testing gas-turbine engines or jet-propulsion engines

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention belongs to the technical field of mechanical test clamping, and provides a method for quantitatively applying uniform circumferential radial force, wherein a device used in the method comprises an upper wedge block, a lower wedge block, a bolt, an upper flange test piece, a lower flange test piece and a tension-compression test bed; the inner edge of the upper flange test piece is machined with a taper, the size of the taper is designed according to requirements, and the inner diameter of the taper is smaller than that of the lower flange test piece, so that the upper wedge block and the lower wedge block can compress the upper flange test piece conveniently. The method can realize the application of the circumferential radial force only by a simple clamp, and a test designer can independently design the size of the cone angle of the upper flange test piece according to the self test requirement. And quantitative uniform circumferential radial force application can be realized through simple mechanical analysis.

Description

Method capable of quantitatively applying uniform circumferential radial force
Technical Field
The invention belongs to the technical field of mechanical test clamping, and relates to a method capable of quantitatively applying uniform circumferential radial force.
Background
In the service process of the aircraft engine, the rotor of the aircraft engine can be subjected to complex loads such as centrifugal load, thermal load, axial pneumatic load and the like, and finally the phenomenon of asynchronous radial slippage of two aircraft rotors connected through bolts is shown. The occurrence of this phenomenon seriously affects the service performance and the expected life of the aircraft engine, so it is necessary to perform relevant experimental research on this phenomenon and explore the formation process and mechanism of this asynchronous radial slip phenomenon. However, in a general principle test, it is difficult for the conventional jig to simulate the actual load of the rotor, and it is impossible to quantitatively apply a uniform circumferential radial force. Therefore, there is a need to develop a method for applying uniform circumferential radial force quantitatively facing a principle test.
Disclosure of Invention
The invention aims to solve the problems and invents a method capable of quantitatively applying uniform circumferential radial force.
The technical scheme of the invention is as follows:
a method for quantitatively applying uniform circumferential radial force comprises the steps that a device used in the method comprises an upper wedge block 1, a lower wedge block 2, a bolt 3, an upper flange test piece 4, a lower flange test piece 5 and a tension and compression test bed 6; the inner edge of the upper flange test piece 4 is processed with a taper, and the size of the taper is designed according to requirements; the upper wedge block 1 is pressed in from the upper surface of an upper flange test piece 4, the lower wedge block 2 is pressed in from the lower surface of a lower flange test piece 5, and the contact position of the upper wedge block 1 and the lower wedge block 2 is positioned in the upper flange test piece 4; the inner diameter of the upper flange test piece 4 is smaller than that of the lower flange test piece 5, so that the upper flange test piece 4 is compressed by the upper wedge block 1 and the lower wedge block 2;
the method comprises the following specific steps:
1) assembling an upper flange test piece 4 with taper at the inner edge and a lower flange test piece 5 without taper at the inner edge, which need to apply uniform pre-tightening force quantitatively, by bolts 3;
2) fixing the lower wedge-shaped block 2 on a tension-compression test bed 6, starting the tension-compression test bed 6, and setting pressing force of the tension-compression test bed 6 according to uniform circumferential radial force required by experimental design;
3) the upper wedge block 4 is compressed by the tension and compression test bed 6 according to a preset compression force, and the compression force acts on the radial direction through the taper of the inner edge of the upper flange test piece 5, so that the upper flange test piece 1 is subjected to quantitative and uniform circumferential radial force.
The invention has the beneficial effects that: the invention aims to provide a method capable of quantitatively applying uniform circumferential radial force. According to the method, the application of circumferential radial force can be realized only by a simple clamp, and a test designer can independently design the size of the cone angle of the upper flange test piece according to the self test requirement. And quantitative uniform circumferential radial force application can be realized through simple mechanical analysis.
Drawings
FIG. 1 is a schematic diagram of the implementation of the process.
FIG. 2 is a cross-sectional view of a test piece and a fixture for the method.
Fig. 3 is an isometric view from above of a test piece and a fixture for the method.
Fig. 4 is a bottom perspective view of a test piece and fixture of the method.
Fig. 5 is a force analysis diagram of the upper flange test piece 1 when the method is implemented.
In the figure: 1, an upper wedge block; 2, a wedge block is arranged; 3, bolts; 4, mounting a flange test piece; 5, a flange test piece; 6, pulling and pressing the test bed.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.
Firstly, a test designer designs the taper angle and the inner diameter of an upper flange test piece 4 according to test requirements, the inner diameter of a lower flange test piece 5 is larger than the inner diameter of the upper flange test piece 4, and the taper angle does not need to be designed, and then the upper flange test piece 4 is connected with the lower flange test piece 5 through a bolt 3; the lower wedge-shaped block 2 is placed on a tension-compression test bed 6, the assembled test piece is placed on the lower wedge-shaped block 2 along the central line, and the assembled test piece can be clamped tightly along the conical circumferential surface of the lower wedge-shaped block 2 due to the action of gravity; then starting the tension-compression test stand 6, and obtaining the circumferential radial force F to be applied according to the stress analysis chart shown in figure 5xPressing force F applied with dynamic tension and compression test stand 6yThe relationship between them is:
Fx＝Fy/tanθ
where θ is the designed taper angle magnitude.
Thus, only the required pressing force F needs to be calculatedyAnd operating the tension and compression test stand 6 to compress according to the pressing force, thus obtaining the required circumferential radial force Fx。
The method for quantitatively applying the uniform circumferential radial force is simple to operate and easy to implement, and a tester can set the size of the taper angle theta according to the test requirement of the tester, so that the uniform radial force can be automatically controlled.

Claims (1)

1. A method for quantitatively applying uniform circumferential radial force comprises the steps that a device used in the method comprises an upper wedge block (1), a lower wedge block (2), a bolt (3), an upper flange test piece (4), a lower flange test piece (5) and a tension and compression test bed (6); the inner edge of the upper flange test piece (4) is processed with a taper, and the size of the taper is designed according to requirements; the upper wedge block (1) is pressed in from the upper surface of the upper flange test piece (4), the lower wedge block (2) is pressed in from the lower surface of the lower flange test piece (5), and the contact position of the upper wedge block (1) and the lower wedge block (2) is positioned in the upper flange test piece (4); the inner diameter of the upper flange test piece (4) is smaller than that of the lower flange test piece (5), so that the upper wedge block (1) and the lower wedge block (2) can compress the upper flange test piece (4);
the method comprises the following specific steps:
1) assembling an upper flange test piece (4) with taper at the inner edge and needing to quantitatively apply uniform pretightening force and a lower flange test piece (5) with no taper at the inner edge through bolts (3);
2) fixing the lower wedge block (2) on a tension-compression test bed (6), starting the tension-compression test bed (6), and setting pressing force of the tension-compression test bed (6) according to uniform circumferential radial force required by experimental design;
3) the upper wedge block (1) is compressed by the tension and compression test bed (6) according to preset compression force, and the compression force acts on the radial direction through the taper of the inner edge of the upper flange test piece (4), so that the upper flange test piece (4) is subjected to quantitative and uniform circumferential radial force.
CN202110439468.0A 2021-04-23 2021-04-23 Method capable of quantitatively applying uniform circumferential radial force Withdrawn CN112985818A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110439468.0A CN112985818A (en) 2021-04-23 2021-04-23 Method capable of quantitatively applying uniform circumferential radial force

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110439468.0A CN112985818A (en) 2021-04-23 2021-04-23 Method capable of quantitatively applying uniform circumferential radial force

Publications (1)

Publication Number Publication Date
CN112985818A true CN112985818A (en) 2021-06-18

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CN202110439468.0A Withdrawn CN112985818A (en) 2021-04-23 2021-04-23 Method capable of quantitatively applying uniform circumferential radial force

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CN (1) CN112985818A (en)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213509A (en) * 1977-12-27 1980-07-22 Pfister Gmbh Hydrostatic setting apparatus for support of loads
US4741205A (en) * 1986-12-22 1988-05-03 Westinghouse Electric Corp. "V" notched integrally shrouded turbine blade and method for determining shroud tightness and wear of a circular array of rotating blades disposed in a rotor
CN104324983A (en) * 2014-11-14 2015-02-04 中国石油集团渤海石油装备制造有限公司 Steel pipe diameter repairing device
CN104801846A (en) * 2014-01-23 2015-07-29 山东大学 Radial friction welding process and device for turbine blades and turbine disk
CN108444687A (en) * 2018-03-15 2018-08-24 大连理工大学 A kind of more bolts of ring flange stretch bending Combined Loading loosen testing machine
CN108918124A (en) * 2018-07-17 2018-11-30 大连理工大学 A kind of more bolts loosen testing machine transverse load amplitude closed loop control method
CN110695678A (en) * 2019-10-21 2020-01-17 上海中船三井造船柴油机有限公司 Hydraulic centering device and method for sectional type crankshaft assembly connection
CN111413083A (en) * 2020-04-27 2020-07-14 大连理工大学 Electromechanical impedance-based flange bolt looseness detection method
EP3715648A1 (en) * 2019-03-25 2020-09-30 fischerwerke GmbH & Co. KG Clamping system, use of a clamping disc and method for prestressing a fastening element
CN112098304A (en) * 2020-10-10 2020-12-18 同济大学 Loading test device and system for testing chloride ion permeation rule in concrete sample
CN212303810U (en) * 2020-06-09 2021-01-05 比亚迪股份有限公司 Battery pack and vehicle
CN112284592A (en) * 2020-10-20 2021-01-29 中国铁路设计集团有限公司 Force measuring method for high-precision vertical force measurement longitudinal and multidirectional movable spherical support
CN112494024A (en) * 2020-11-17 2021-03-16 江苏鱼跃医疗设备股份有限公司 Sliding compression type arm cylinder device

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213509A (en) * 1977-12-27 1980-07-22 Pfister Gmbh Hydrostatic setting apparatus for support of loads
US4741205A (en) * 1986-12-22 1988-05-03 Westinghouse Electric Corp. "V" notched integrally shrouded turbine blade and method for determining shroud tightness and wear of a circular array of rotating blades disposed in a rotor
CN104801846A (en) * 2014-01-23 2015-07-29 山东大学 Radial friction welding process and device for turbine blades and turbine disk
CN104324983A (en) * 2014-11-14 2015-02-04 中国石油集团渤海石油装备制造有限公司 Steel pipe diameter repairing device
CN108444687A (en) * 2018-03-15 2018-08-24 大连理工大学 A kind of more bolts of ring flange stretch bending Combined Loading loosen testing machine
CN108918124A (en) * 2018-07-17 2018-11-30 大连理工大学 A kind of more bolts loosen testing machine transverse load amplitude closed loop control method
EP3715648A1 (en) * 2019-03-25 2020-09-30 fischerwerke GmbH & Co. KG Clamping system, use of a clamping disc and method for prestressing a fastening element
CN110695678A (en) * 2019-10-21 2020-01-17 上海中船三井造船柴油机有限公司 Hydraulic centering device and method for sectional type crankshaft assembly connection
CN111413083A (en) * 2020-04-27 2020-07-14 大连理工大学 Electromechanical impedance-based flange bolt looseness detection method
CN212303810U (en) * 2020-06-09 2021-01-05 比亚迪股份有限公司 Battery pack and vehicle
CN112098304A (en) * 2020-10-10 2020-12-18 同济大学 Loading test device and system for testing chloride ion permeation rule in concrete sample
CN112284592A (en) * 2020-10-20 2021-01-29 中国铁路设计集团有限公司 Force measuring method for high-precision vertical force measurement longitudinal and multidirectional movable spherical support
CN112494024A (en) * 2020-11-17 2021-03-16 江苏鱼跃医疗设备股份有限公司 Sliding compression type arm cylinder device

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Application publication date: 20210618