CN-122016320-A - Sectional type centrifuge radial arm

CN122016320ACN 122016320 ACN122016320 ACN 122016320ACN-122016320-A

Abstract

The invention provides a sectional type centrifugal machine radial arm which comprises a connecting end, a load end and a counterweight end, wherein the load end is detachably connected with one end of the connecting end and used for clamping an object to be tested, and the counterweight end is detachably connected with the other end of the connecting end and used for placing a counterweight block. Compared with the prior art, the invention has the beneficial effects that the welded box-type structure and the variable thickness section design are created, the bending rigidity and the torsional rigidity of the rotating arm in the horizontal direction and the up-down direction are ensured, and the structural quality of the rotating arm is effectively controlled by the design of the large-size lightening hole.

Inventors

WANG XIN
HUANG QINGDONG
LI PENGBIN
LI LINHONG
LIU TINGWU
YE BENYUAN

Assignees

中国航发四川燃气涡轮研究院

Dates

Publication Date: 20260512
Application Date: 20260109

Claims (10)

1. A segmented centrifuge radial arm comprising: A connection end (4); The load end (1) is detachably connected with one end of the connecting end (4), and the load end (1) is used for clamping an object to be tested; The counterweight end (6) is detachably connected with the other end of the connecting end (4), and the counterweight end (6) is used for placing a counterweight block.
2. The radial arm of a segmented centrifuge according to claim 1, wherein the load end (1) is connected to one end of the connecting end (4) by a first connecting element and the counterweight end (6) is connected to the other end of the connecting end (4) by a second connecting element.
3. The segmented centrifugal radial arm according to claim 2, wherein one end of the connecting end (4) corresponding to the load end (1) is provided with a plurality of connecting through holes corresponding to positions, and one end of the other end of the connecting end (4) corresponding to the counterweight end (6) is provided with a plurality of connecting through holes corresponding to positions.
4. A segmented centrifuge radial arm according to claim 3 wherein the first and second connection assemblies are identical in construction, the first connection assembly comprising: The two first screws (13) are symmetrically arranged along the perpendicular bisector of the connecting end face, and the connecting line of the axes of the two first screws (13) is positioned on the horizontal bisector of the connecting end face; a plurality of second screws (14) arranged in an array on the outer periphery of the two first screws (13).
5. The segmented centrifuge radial arm of claim 4, wherein the first connection assembly further comprises: the first connecting flange (11) is arranged on the upper end face of the connection part of the load end (1) and one end of the connecting end (4), and two sides of the first connecting flange (11) are respectively connected with one ends of the load end (1) and the connecting end (4); The second connecting flange (12) is arranged on the lower end face of the connecting part of the load end (1) and one end of the connecting end (4), and two sides of the second connecting flange (12) are respectively connected with one ends of the load end (1) and the connecting end (4).
6. The radial arm of a segmented centrifuge according to claim 4, characterized in that the load end (1) and the end of the connecting end (4) are each provided with a plurality of line through holes arranged along a perpendicular bisector of the connecting end face.
7. The radial arm of a segmented centrifuge according to claim 6, characterized in that the connecting end (4) is connected to a drive shaft (18), a line (19) is arranged in the drive shaft (18), and the line (19) is connected to an object to be measured placed at the load end (1) through a corresponding line through hole.
8. The segmented centrifuge radial arm according to claim 1, characterized in that the side walls of the connection end (4), the load end (1) and the counterweight end (6) are provided with fairings (2).
9. The segmented centrifuge radial arm according to claim 1, characterized in that a damping device (17) is arranged in the load end (1), the damping device (17) being fastened to the load end (1) by means of bolts.
10. The radial arm of a segmented centrifuge according to claim 1, wherein one end of the load end (1) for clamping an object to be tested is provided with a circular ring assembly for threading the spindle, the circular ring assembly has two opposite inner side walls, and at least one inner side wall is provided with a limiting assembly for limiting the rotation of the object to be tested.

Description

Sectional type centrifuge radial arm Technical Field The invention relates to the technical field of aero-engine and lubricating oil system testing, in particular to a sectional type centrifugal machine radial arm. Background The lubricating oil system of the aeroengine mainly provides necessary cooling and lubricating capacity for friction pairs such as bearings, gears and seals, and ensures safe and reliable operation of the lubricating oil system. However, in the actual flight process, the working posture and external load of the engine are affected by factors such as weather and the use characteristics of the aircraft, and the like, and particularly for high-mobility aircraft such as fighters, the change is frequent and remarkable, and strict requirements are put on the working reliability of the lubricating oil system. It is therefore necessary to develop a special test on the whole lubricating oil system during the design phase to verify its working capacity under mobile load conditions. The large-sized centrifugal machine is used as equipment capable of stably providing large overload, is widely applied to civil engineering, water conservancy, electronics and aerospace, and becomes a preferred framework of simulation test equipment. Considering the standard requirements of national army standards and the like and the test process, the slender rotating arm of the multi-shaft centrifugal machine reaches 15 m, the rotating arm of the conventional centrifugal machine has lower rigidity in the vertical direction and the tangential direction of the rotating plane, and when dynamic torque and impact force generated by a large mass load arranged at the tail end of the rotating arm act on the rotating arm, low-frequency vibration and overlarge structural deformation are easy to occur, so that the safety of equipment is adversely affected. Different from a geotechnical centrifuge, the torque and impact force transmitted by a load to a rotating arm during an aeroengine lubricating oil system test are multidirectional pulse type disturbance, the torque impact amplitude can reach 10 ten thousand Niumi, and a severe test is provided for the rigidity and strength of the rotating arm. In addition, the integral radial arm adopted by the conventional centrifugal machine not only provides harsh requirements for blank cutting, welding, heat treatment, finish machining and the like, but also is quite unfavorable for transportation and installation. Disclosure of Invention In view of the above, the present invention provides a segmented centrifuge radial arm to achieve the objective of effectively improving the structural rigidity and workability of the radial arm. The invention provides a sectional type centrifugal machine radial arm which comprises a connecting end, a load end and a counterweight end, wherein the load end is detachably connected with one end of the connecting end and used for clamping an object to be tested, and the counterweight end is detachably connected with the other end of the connecting end and used for placing a counterweight block. Compared with the prior art, the invention has the beneficial effects that the welded box-type structure and the variable thickness section design are created, the bending rigidity and the torsional rigidity of the rotating arm in the horizontal direction and the up-down direction are ensured, and the structural quality of the rotating arm is effectively controlled by the design of the large-size lightening hole. The size of the rotating arm is reduced from 15m to 5.8 m on the premise of ensuring the structural strength and rigidity of the rotating arm through the redundant connection design which is mutually backup, so that the processing and heat treatment manufacturability of the rotating arm are greatly improved, and the centrifugal machine is applicable to centrifugal machines with stable acceleration not more than 115 m/s 2 or centrifugal machine capacity not more than 180 gt. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. FIG. 1 is a schematic diagram of a high stiffness segmented rotor arm for a multi-axis centrifuge provided by an embodiment of the present invention; FIG. 2 is a cross-sectional view of a high stiffness segmented boom provided by an embodiment of the present invention; FIG. 3 is a schematic diagram of the size of a load side according to an embodiment of the present invention; FIG. 4 is a schematic diagram of redundant connection between a load end and a connection end according to an embodiment of the present invention; FIG. 5 is a cross-sectional view of a load