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CN-121977012-A - Bearing structure for ultrahigh-rotation-speed heavy-load centrifugal machine and centrifugal testing machine

CN121977012ACN 121977012 ACN121977012 ACN 121977012ACN-121977012-A

Abstract

The invention relates to the technical field of supergravity test equipment, in particular to a bearing structure for an ultra-high rotation speed heavy load centrifugal machine and a centrifugal test machine. The bearing structure for the ultrahigh-speed heavy-load centrifugal machine comprises a first bearing mechanism, wherein the first bearing mechanism is arranged on the bottom civil engineering foundation of the centrifugal test machine in an installation state, the first bearing mechanism comprises a first dynamic and static hybrid bearing and a thrust bearing which are coaxially arranged, the first dynamic and static hybrid bearing and the thrust bearing are both arranged outside the middle part of a main shaft of the centrifugal machine in the installation state, the limitation of the size, the bearing and the rotating speed of a mechanical rolling bearing system can be broken through, the service life is long, and the bearing structure is suitable for long-duration and frequent start-stop use conditions and meets the use requirements of the ultrahigh-speed large-scale centrifugal machine. The centrifugal testing machine is suitable for the bearing structure for the ultrahigh-speed heavy-load centrifugal machine, can break through the limitation of the size, the bearing capacity and the rotating speed of a mechanical rolling bearing system, and has long service life.

Inventors

  • CHEN LEI
  • LI XINYAO
  • CHEN LIANGJUN
  • LV LEI
  • ZHANG ZHIQIANG
  • FU XING

Assignees

  • 中国工程物理研究院总体工程研究所

Dates

Publication Date
20260505
Application Date
20260206

Claims (10)

  1. 1. The bearing structure for the ultra-high-speed heavy-load centrifugal machine is characterized by comprising a first bearing mechanism (10), wherein the first bearing mechanism (10) is installed on a bottom civil engineering foundation of a centrifugal test machine in an installation state; The first bearing mechanism (10) comprises a first dynamic and static pressure mixed bearing (11) and a thrust bearing (12) which are coaxially arranged, and the first dynamic and static pressure mixed bearing (11) and the thrust bearing (12) are both arranged outside the middle part of the main shaft (20) of the centrifugal machine in an installation state.
  2. 2. Bearing arrangement for an ultra high rotational speed heavy load centrifuge according to claim 1, characterized in that the first bearing arrangement (10) further comprises a first mounting frame (13), the first hybrid bearing (11) and the thrust bearing (12) being mounted on the first mounting frame (13).
  3. 3. Bearing structure for ultra-high rotational speed heavy load centrifuges according to claim 2, characterized in that the peripheral side wall of the first mounting frame (13) is provided with a plurality of first radial support assemblies (16), each of said first radial support assemblies (16) being able to abut against the lateral civil foundation middle of the centrifugal test machine.
  4. 4. Bearing arrangement for an ultra high rotational speed heavy load centrifuge according to claim 2, characterized in that the thrust bearing (12) is fitted with a thrust head (14), which thrust head (14) is defined in the first mounting frame (13).
  5. 5. The bearing structure for an ultra-high rotational speed heavy load centrifuge according to any one of claims 1 to 4, further comprising a second bearing mechanism (30), said second bearing mechanism (30) being mounted on a top civil foundation of the centrifugal test machine in a mounted state; the second bearing mechanism (30) comprises a second dynamic and static pressure mixed bearing (31), and the second dynamic and static pressure mixed bearing (31) is arranged at the upper end of the main shaft (20) of the centrifugal machine in an installation state.
  6. 6. The bearing structure for an ultra-high rotational speed heavy load centrifuge according to claim 5, wherein said second bearing mechanism (30) further comprises a second mounting bracket (32), said second hybrid bearing (31) being mounted on said second mounting bracket (32); The second mounting frame (32) is provided with a plurality of second radial supporting components (33) on the peripheral side wall, and each second radial supporting component (33) can be abutted to the upper part of the lateral civil engineering foundation of the centrifugal testing machine.
  7. 7. Bearing structure for an ultra-high rotational speed heavy load centrifuge according to claim 5, characterized in that said second hybrid bearing (31) comprises a first sliding rotor (31 a) and a first sliding guide bearing (31 b), said first sliding rotor (31 a) being axially slidable with respect to said first sliding guide bearing (31 b) and rotatable along its own axis.
  8. 8. The bearing structure for an ultra-high rotational speed heavy load centrifuge according to claim 5, further comprising a third bearing mechanism (40), said third bearing mechanism (40) being mounted on a lower civil foundation of the centrifugal test machine in a mounted state; the third bearing mechanism (40) comprises a third hybrid dynamic-static bearing (41), and the third hybrid dynamic-static bearing (41) is installed at the lower end of the main shaft (20) of the centrifugal machine in an installation state.
  9. 9. Bearing arrangement for an ultra high rotational speed heavy load centrifuge according to claim 8, characterized in that the third bearing means (40) further comprises a third mounting frame (42), the third hybrid hydrostatic bearing (41) being mounted on the third mounting frame (42); The side wall of the periphery of the third mounting frame (42) is provided with a plurality of third radial supporting components (43), and each third radial supporting component (43) can be abutted against the lower part of the lateral civil engineering foundation of the centrifugal testing machine.
  10. 10. A centrifugal testing machine, comprising: a centrifuge spindle (20), the centrifuge spindle (20) being mounted on a corresponding civil engineering basis by means of a bearing structure for an ultra high rotational speed heavy load centrifuge according to any one of claims 1 to 9; The rotary arm support (60), rotary arm support (60) mid-mounting is on centrifuge main shaft (20), and rotary arm support (60) are located first bearing mechanism (10) top.

Description

Bearing structure for ultrahigh-rotation-speed heavy-load centrifugal machine and centrifugal testing machine Technical Field The invention relates to the technical field of supergravity test equipment, in particular to a bearing structure for an ultra-high rotation speed heavy load centrifugal machine and a centrifugal test machine. Background The supergravity experiment is an important means in scientific research, and creates physical conditions far exceeding the earth's normal gravity through a specific technical mode. By virtue of this condition, the physical movement processes, which often take a long time to complete in nature, and the complex multi-phase medium interaction processes, can be compressed into a time and space range that can be directly observed and effectively controlled by a laboratory. For example, in the field of aerospace, the supergravity field can be used for simulating an extreme mechanical environment, providing support for performance test of related materials and equipment, in the geotechnical industry, the supergravity field can assist in simulating material characteristics under different gravity conditions, providing basis for engineering design and evaluation, and in the preparation of materials, the supergravity field can positively influence the material forming process, thereby being beneficial to improving the quality of the materials. The method is greatly convenient for scientific researchers to deeply study various characteristics and changes of substances under extreme conditions, so that powerful support is provided for the promotion of related research works, and the research fields are promoted to be continuously developed. In the prior art, the hypergravity field is created by centripetal acceleration generated by a centrifugal testing machine through a rotor driving a load to rotate. In existing centrifuge designs, mechanical rolling bearings are often used as the drive support core component. The design and the selection of the mechanical rolling bearing are limited by dynamic load, working rotation speed, structural size, lubrication and cooling conditions and the like during use, and the service life of the rolling bearing is limited. The diameter of the main shaft of the ultra-high-speed large centrifugal machine is nearly 1 meter, the working speed is more than hundreds of revolutions per minute, the size scale and the long-duration and frequent start-stop working conditions are far beyond the use range of the mechanical rolling bearing, the mechanical rolling bearing is adopted to support and mount the ultra-high-speed large centrifugal machine, the use requirements of the size, the bearing, the rotating speed and the service life cannot be met, and the development trend of the large-size and the high-rotating-speed of the centrifugal machine cannot be met. Disclosure of Invention Aiming at the technical problem that the existing mechanical rolling bearing can not meet the use requirement of the ultra-high-speed large-sized centrifuge, the invention provides a bearing structure for the ultra-high-speed heavy-load centrifuge and a centrifugal testing machine, which can break through the limitation of the size, the bearing and the rotating speed of the mechanical rolling bearing system, have long service life, are suitable for long-duration and frequent start-stop use conditions, and meet the use requirement of the ultra-high-speed large-sized centrifuge. The invention is realized by the following technical scheme: The invention provides a bearing structure for an ultrahigh-speed heavy-load centrifugal machine, which comprises a first bearing mechanism, wherein the first bearing mechanism is installed on a bottom civil engineering foundation of a centrifugal test machine in an installation state, the first bearing mechanism comprises a first dynamic and static pressure mixed bearing and a thrust bearing which are coaxially arranged, and the first dynamic and static pressure mixed bearing and the thrust bearing are both installed outside the middle part of a main shaft of the centrifugal machine in the installation state. The bearing structure for the ultrahigh-speed heavy-load centrifugal machine comprises a first bearing mechanism, wherein the first bearing mechanism is arranged on the bottom civil engineering foundation of the centrifugal test machine in an installation state, and meanwhile, the first bearing mechanism comprises a first dynamic and static pressure mixed bearing and a thrust bearing which are coaxially arranged, so that a centrifugal machine main shaft is arranged on the bottom civil engineering foundation of the centrifugal test machine through the first dynamic and static pressure mixed bearing and the thrust bearing, and therefore, the thrust bearing is used for providing vertical support, the effect of bearing vertical load is achieved, the axial movement of the centrifugal machine main shaft is avoided, the radial support is provide