CN-121977811-A - Axial eccentric test loading control device and method

Abstract

The application relates to an axial eccentric test loading control device and method, in particular to test loading equipment capable of realizing eccentric loading and monitoring loading load in real time, and belongs to the field of aircraft design and manufacturing. The eccentric load adjusting device comprises a load transmission shaft, a compression loading sleeve, a tension loading sleeve, a compression force measuring sleeve, a tension force measuring sleeve, a force bearing rod, an eccentric adjusting spring and a connecting bolt, wherein eccentric loading adjustment can be realized in the testing process, and the adjusting capability of testing equipment is improved. The load real-time monitoring can be realized, and the loading capacity of the test equipment is improved. Simple structure, convenient development and practicality, and has very high economic benefit. The universality is high, the method can be applied to a plurality of test industries, and the application range is wide.

Inventors

• MENG FANLI
• LV GUOCHENG
• MA SHUANG
• Mao Leikai
• WANG HUAN
• DU HONGYU
• MENG LIHUA

Assignees

• 中航沈飞民用飞机有限责任公司

Dates

Publication Date

20260505

Application Date

20260403

Claims (6)

1. 1. An axial eccentric test loading control device is characterized in that, The device comprises a load transmission shaft (1), a compression loading sleeve (2), a tension loading sleeve (3), a compression force measuring sleeve (4), a tension force measuring sleeve (5), a force bearing rod (6), an eccentric adjusting spring (7) and a connecting bolt (8); The load transmission shaft (1), the compression loading sleeve (2), the tension loading sleeve (3), the compression force measuring sleeve (4) and the tension force measuring sleeve (5) are concentrically arranged; The middle part of the carrying shaft (1) is provided with a flange (11), the lower part of the carrying shaft (1) is provided with a tooth groove clamping fixing structure (12), the tooth groove clamping fixing structure (12) is provided with a plurality of tooth grooves (13), and the tooth grooves (13) are only arranged on the outer side; the compression loading sleeve (2) and the tension loading sleeve (3) are respectively arranged at the outer side of the load transmission shaft (1) and are connected through a connecting bolt (8); the compression force measuring sleeve (4) is arranged inside the compression loading sleeve (2) and is contacted with the upper surface of the flange (11); the stretching force measuring sleeve (5) is arranged inside the stretching loading sleeve (3) and is contacted with the lower surface of the flange (11); an eccentric adjusting spring (7) and a spring button (9) are arranged on the circular broken end at one end of the stress rod (6); The stress rod (6) is connected with the load transmission shaft (1) through a tooth socket clamping fixing structure (12), and the eccentric amount of the stress rod (6) and the load transmission shaft (1) is adjusted through a stop block (10) and an eccentric adjusting spring (7).
2. 2. The axial eccentricity test loading control device according to claim 1, characterized in that, The compression loading sleeve (2) and the tension loading sleeve (3) are provided with a plurality of long holes, and strain gauges are adhered to the compression force measuring sleeve (4) and the tension force measuring sleeve (5) through the long holes.
3. 3. A loading control method for an axial eccentric test is characterized in that, The axial eccentricity test loading control device according to claim 2 is adopted; The method comprises the following steps: Eccentric loading control is performed first, and then compression loading control or tension loading control is performed as required.
4. 4. The method of claim 3, wherein the step of, The eccentric loading control includes the steps of: The eccentric adjusting spring (7) is driven to compress by pressing the spring button (9), the stop block (10) on the stress rod (6) is driven to move towards the center of the stress rod (6), the stop block (10) is not limited by the tooth groove (13) and can move at will, after the stop block (10) moves to a certain position, the spring button (9) is released, the stop block (10) enters the tooth groove (13), the tooth groove (13) is used for limiting the stop block (10) and is immovable, and after the stop block (10) is limited by the tooth groove (13), the transmission shaft (1) and the stress rod (6) are axially misaligned, so that eccentricity is realized.
5. 5. The method of claim 3, wherein the step of, The compression loading control includes the steps of: The eccentric amount of the load transmission shaft (1) and the stress rod (6) is adjusted, eccentric loading is guaranteed, the clamping head (21) on the testing machine moves downwards to press the compression loading sleeve (2), the compression loading sleeve (2) is in contact with the upper surface of the compression force measurement sleeve (4), the compression force measurement sleeve (4) is pressed downwards, the strain gauge on the compression force measurement sleeve (4) is changed continuously along with the deformation of the compression force measurement sleeve (4), the compression load output by the axial eccentric test loading control device is monitored in real time through the strain value of the strain gauge on the compression force measurement sleeve (4), the lower surface of the compression force measurement sleeve (4) is in contact with the upper surface of the flange (11) of the load transmission shaft (1), the downward pressing of the load transmission shaft (1) is achieved, the downward movement of the load transmission shaft (1) drives the stress rod (6) to move downwards, and the compression loading of the test piece on the clamping head (22) under the testing machine is further achieved by the stress rod (6).
6. 6. The method of claim 3, wherein the step of, The tensile loading control includes the steps of: The eccentric amount of the load transmission shaft (1) and the stress rod (6) is adjusted, eccentric loading is guaranteed, the clamping head (21) on the testing machine moves upwards, the tension loading sleeve (3) is driven to move upwards through the compression loading sleeve (2), the tension loading sleeve (3) is in contact with the lower surface of the tension loading sleeve (5), the tension loading sleeve (5) is pressed upwards, strain gauges on the tension loading sleeve (5) continuously change along with deformation of the tension loading sleeve (5), the tension load output by the axial eccentric test loading control device is monitored in real time, the upper surface of the tension loading sleeve (5) is in contact with the lower surface of the flange (11) of the load transmission shaft (1), the tension loading shaft (1) is pressed upwards, the tension loading sleeve (6) is driven to move upwards through the upward movement of the tension loading sleeve (1), and the tension loading of test pieces on the clamping head (22) under the testing machine is further achieved through the stress rods (6).

Description

Axial eccentric test loading control device and method Technical Field The application relates to an axial eccentric test loading control device and method, in particular to test loading equipment capable of realizing eccentric loading and monitoring loading load in real time, and belongs to the field of aircraft design and manufacturing. Background Load-bearing apparatuses are widely used in laboratories, where adjustability, manipulability, versatility are important factors affecting the use of the load-bearing apparatus. For tests requiring eccentric loading and real-time monitoring of loading load, a loading device is usually directly added on an original test piece, or a plurality of actuating cylinders move in a coordinated manner to control the eccentric loading direction and the loading size in real time. The two methods have certain defects that 1) a loading device is added on an original component, enough space is needed for installing the additional loading device, meanwhile, the method needs to be connected with the original component to damage the original component, and 2) the action is complex, the structure is complex, the operation movement is not easy to control and the like due to the coordination movement control loading of a plurality of actuating cylinders. Disclosure of Invention The application provides an axial eccentric test loading control device and method, which can meet the requirements of eccentric loading and real-time monitoring of the loaded load of a test piece in the test process, and solve the technical problems that the eccentric loading is difficult and the real-time monitoring of the loaded load cannot be realized in the test process in the prior art. The axial eccentric test loading control device comprises a load transmission shaft, a compression loading sleeve, a tension loading sleeve, a compression force measuring sleeve, a tension force measuring sleeve, a stress rod, an eccentric adjusting spring and a connecting bolt. The load transmission shaft, the compression loading sleeve, the tension loading sleeve, the compression force measuring sleeve and the tension force measuring sleeve are concentrically arranged. The middle part of the transmission and carrying shaft is provided with a flange, the lower part of the transmission and carrying shaft is provided with a tooth slot clamping fixing structure, the tooth slot clamping fixing structure is provided with a plurality of tooth slots, and the tooth slots are only arranged on the outer side. The compression loading sleeve and the tension loading sleeve are respectively arranged on the outer side of the load transmission shaft and are connected through connecting bolts. The compression force sleeve is disposed within the compression load sleeve in contact with the upper surface of the flange. The tensile force sleeve is arranged inside the tensile load sleeve and is in contact with the lower surface of the flange. An eccentric adjusting spring and a spring button are arranged on the circular broken end at one end of the stress rod. The stress rod is connected with the load transmission shaft through a tooth slot clamping and fixing structure, and the eccentric quantity of the stress rod and the load transmission shaft is regulated through a stop block and an eccentric regulating spring. The compression loading sleeve and the tension loading sleeve are provided with a plurality of long holes, and strain gauges are stuck on the compression force measuring sleeve and the tension force measuring sleeve through the long holes. The assembly sequence of the axial eccentric test loading control device is as follows: The method comprises the steps of loading a compression force measuring sleeve into a compression loading sleeve, loading a load transmission shaft into the compression force measuring sleeve, enabling the length of the load transmission shaft, which is positioned at the upper part of a flange, to be smaller than that of the compression loading sleeve, sleeving a tensile force measuring sleeve outside the load transmission shaft from the lower part, sleeving a tensile loading sleeve outside the tensile force measuring sleeve from the lower part, enabling the length of the load transmission shaft, which is positioned at the lower part of the flange, to be larger than that of the tensile loading sleeve, enabling the compression loading sleeve and the tensile loading sleeve to be fixed through connecting bolts, and enabling a stress rod to be implanted into a tooth groove clamping fixing structure of the load transmission shaft. According to another aspect of the present application, there is provided an axial eccentricity test loading control method, employing the axial eccentricity test loading control apparatus described above. The method comprises the following steps: Eccentric loading control is performed first, and then compression loading control or tension loading control is performed as required. The ec