CN112371356A - High-precision angle positioning structure for centrifugal machine - Google Patents

High-precision angle positioning structure for centrifugal machine Download PDF

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Publication number
CN112371356A
CN112371356A CN202011327747.XA CN202011327747A CN112371356A CN 112371356 A CN112371356 A CN 112371356A CN 202011327747 A CN202011327747 A CN 202011327747A CN 112371356 A CN112371356 A CN 112371356A
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CN
China
Prior art keywords
bead
azimuth
single move
precision
positioning
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Pending
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CN202011327747.XA
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Chinese (zh)
Inventor
张欣
喻凯
张长清
余祖珏
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Jiujiang Precision Measuring Technology Research Institute
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Jiujiang Precision Measuring Technology Research Institute
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Priority to CN202011327747.XA priority Critical patent/CN112371356A/en
Publication of CN112371356A publication Critical patent/CN112371356A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04BCENTRIFUGES
    • B04B7/00Elements of centrifuges
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04BCENTRIFUGES
    • B04B5/00Other centrifuges
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04BCENTRIFUGES
    • B04B9/00Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/08Arrangement or disposition of transmission gearing ; Couplings; Brakes

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Abstract

The invention discloses a high-precision angle positioning structure for a centrifugal machine, which comprises an orientation high-precision positioning structure fixed at the upper end of the centrifugal machine, wherein a pitching high-precision positioning structure is arranged at the upper end of the orientation high-precision positioning structure, and a load working table is arranged at the upper end of the pitching high-precision positioning structure. The high-precision angle positioning structure realizes high-precision angle positioning of a load on a high-speed centrifuge through an azimuth high-precision positioning structure and a pitching high-precision positioning structure; the novel centrifugal machine can bear higher load bearing capacity, can realize precise angle positioning, has better angle positioning repeatability, and can ensure the accuracy of the angle positioning when the centrifugal machine rotates at high speed.

Description

High-precision angle positioning structure for centrifugal machine
Technical Field
The invention relates to a high-precision angle positioning structure for a centrifugal machine.
Background
The centrifugal machine is a detection device for reproducing an acceleration physical quantity value through angular motion to check a linear accelerometer, a gyroscope and an inertial navigation guidance system, and is an important inertial navigation test device for calibrating the accelerometer. With the development of the inertial navigation testing technology, the linear accelerometer, the gyroscope and the inertial navigation guidance system are often required to check the dynamic performance under different environments and attitude angles, and most of the existing single-shaft centrifuges in the market cannot easily provide performance tests under different attitude angles for the linear accelerometer, the gyroscope and the inertial navigation guidance system, and meanwhile, the centrifuges can generate larger centrifugal force when rotating at high speed, and conventional angle positioning mechanisms such as a back block structure and a mechanical bearing structure can generate larger angle positioning errors under the action of huge centrifugal force. In order to solve the above problems, a group of high-precision angle positioning structures capable of ensuring the accuracy of angle positioning when the centrifuge rotates at a high speed needs to be invented.
Disclosure of Invention
The present invention is directed to a high-precision angular positioning structure for a centrifugal machine, which solves the above-mentioned problems of the prior art.
The technical scheme adopted for achieving the purpose is that the high-precision angle positioning structure for the centrifugal machine comprises an azimuth high-precision positioning structure fixed at the upper end of the centrifugal machine, a pitching high-precision positioning structure is arranged at the upper end of the azimuth high-precision positioning structure, and a load working table is arranged at the upper end of the pitching high-precision positioning structure; the azimuth high-precision positioning structure comprises a fixed base fixedly connected with the centrifuge, an azimuth rotating shaft is axially and fixedly arranged at the central position of the fixed base through an azimuth bearing, an azimuth bearing end cover is arranged at the upper end of the azimuth bearing, 2 azimuth positioning holes are arranged on the upper end face of the fixed base, azimuth dense bead structures are arranged in the 2 azimuth positioning holes, and the azimuth dense bead structures are connected with the azimuth positioning pins; every single move high accuracy location structure includes the every single move support of suit in position rotation axis upper end, the every single move support is installed in position high accuracy location structure's upper end through position locating pin location, install the every single move rotation axis through the every single move bearing in the every single move support, every single move rotation axis upper end fixed connection load table surface, the one end of every single move rotation axis is equipped with every single move bearing end cover, radially be equipped with 2 every single move locating holes on the every single move rotation axis, all be equipped with the dense pearl structure of every single move in 2 every single move locating holes, the dense pearl structure of every single move is connected with the.
High accuracy angle location structure have 2, 2 high accuracy angle location structures all fix the upper end at centrifuge.
The azimuth bead-sealing structure and the pitching bead-sealing structure have the same structure and respectively comprise bead-sealing seats, bead-sealing supports are arranged in the bead-sealing seats, beads are arranged in the bead-sealing supports, and bead-sealing pressing covers are arranged at one ends of the bead-sealing seats.
Advantageous effects
Compared with the prior art, the invention has the following advantages.
The invention has the advantages that the structure can bear higher load bearing capacity through the positioning of the dense bead structure, can realize precise angle positioning, has better angle positioning repeatability, and can ensure the accuracy of the angle positioning when the centrifugal machine rotates at high speed.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a front cross-sectional view of the structure of the present invention;
FIG. 2 is a side cross-sectional view of the structure of the present invention;
FIG. 3 is a cross-sectional view of the azimuth dense-bead structure and the elevation dense-bead structure of the present invention;
FIG. 4 is a schematic view of the overall structure of the centrifuge and the high-precision positioning structure according to the present invention.
Detailed Description
The invention is further described with reference to the following examples and the accompanying drawings.
A high-precision angle positioning structure for a centrifuge comprises an orientation high-precision positioning structure 1 fixed at the upper end of a centrifuge 21, as shown in figures 1-4, a pitching high-precision positioning structure 2 is arranged at the upper end of the orientation high-precision positioning structure 1, and a load working table surface 3 is arranged at the upper end of the pitching high-precision positioning structure 2; the azimuth high-precision positioning structure 1 comprises a fixed base 4 fixedly connected with a centrifuge 21, an azimuth rotating shaft 5 is axially and fixedly arranged at the central position of the fixed base 4 through an azimuth bearing 7, an azimuth bearing end cover 8 is arranged at the upper end of the azimuth bearing 7, 2 azimuth positioning holes 19 are arranged on the upper end face of the fixed base 4, azimuth dense bead structures 9 are arranged in the 2 azimuth positioning holes 19, and the azimuth dense bead structures 9 are connected with azimuth positioning pins 6; every single move high accuracy location structure 2 is including the every single move support 10 of suit on position rotation axis 5 upper end, every single move support 10 is installed in the upper end of position high accuracy location structure 1 through the 6 location of position locating pin, every single move support 10 is interior to install every single move rotation axis 11 through every single move bearing 13, and 11 upper end fixed connection load table surfaces 3 of every single move rotation axis, and the one end of every single move rotation axis 11 is equipped with every single move bearing end cover 14, radial 2 every single move locating holes 20 that are equipped with on the every single move rotation axis 11 all are equipped with the dense pearl structure 22 of every single move in 2 every single move locating holes 20, and the dense pearl structure 22 of every single move is connected with.
High accuracy angle location structure have 2, 2 high accuracy angle location structures all fix centrifuge 21's upper end.
The azimuth bead-sealing structure 9 and the pitching bead-sealing structure 22 have the same structure and respectively comprise a bead-sealing seat 15, a bead-sealing support 16 is arranged in the bead-sealing seat 15, beads 17 are arranged in the bead-sealing support 16, and a bead-sealing gland 18 is arranged at one end of the bead-sealing seat 15.
In the invention, the azimuth high-precision positioning structure 1 comprises a fixed base 4, an azimuth rotating shaft 5, an azimuth positioning pin 6, an azimuth bearing 7, an azimuth bearing end cover 8 and an azimuth bead-sealing structure 9, the azimuth high-precision positioning of the device is realized through the precision matching of the azimuth rotating shaft 5 and the azimuth bead-sealing structure 9, and the azimuth high-precision positioning structure 1 can realize two horizontal attitude angle stations of 0 degree and 90 degrees; the pitching high-precision positioning structure 2 comprises a pitching support 10, a pitching rotating shaft 11, a pitching positioning pin 12, a pitching bearing 13, a pitching bearing end cover 14 and a pitching dense-bead structure (22), and the pitching high-precision positioning of the device is realized through the precise matching of the pitching rotating shaft 11 and the pitching dense-bead structure 22, and the pitching high-precision positioning structure 2 can realize two pitching attitude angle stations of 0 degree and 90 degrees; the orientation bead-sealing structure 9 and the pitching bead-sealing structure (22) both comprise a bead-sealing seat 15, a bead-sealing support 16, a bead-sealing 17 and a bead-sealing gland 18, the orientation bead-sealing structure 9 and the pitching bead-sealing structure (22) are the basis of the high-precision angle positioning structure of the centrifuge, the high-precision angle positioning is realized through the interference fit among the orientation positioning pin 6, the pitching positioning pin 12, the orientation bead-sealing structure 9 and the pitching bead-sealing structure (22), a group of conical holes are processed on the bead-sealing support 16, so that the bead-sealing 17 can freely roll between the bead-sealing support 16 and the bead-sealing seat 15, and after the orientation positioning pin 6 and the pitching positioning pin 12 are screwed out, the bead-sealing support 17 cannot fall out of the bead-sealing support 16 due to the shape of the conical holes of the bead-sealing support 16.
In the invention, 2 high-precision angle positioning structures are symmetrically arranged at two sides of the upper end of a centrifugal machine 21 about a rotating shaft of the centrifugal machine, an azimuth high-precision positioning structure 1 is arranged at the upper end of a table board of the centrifugal machine through a flange spigot, and a pitching high-precision positioning structure 2 is connected with the azimuth high-precision positioning structure 1 through the precision fit between an azimuth rotating shaft 5 and a pitching support 10; the load table 3 is mounted on a pitch rotation axis 11.
The azimuth high-precision positioning structure 1 comprises 1 fixed base 4, 1 azimuth rotating shaft 5, 2 azimuth positioning pins 6, 1 pair of azimuth bearings 7, 1 azimuth bearing end cover 8 and 4 sets of azimuth dense bead structures 9; during operation, 2 position locating pins 6 are screwed into the position dense bead structure 9, when the position attitude angle station needs to be replaced, the 2 position locating pins 6 are screwed out, the pitching support 10 is rotated by 90 degrees and then screwed into the position locating pins 6, and the change of the position attitude angle of the high-precision positioning structure can be realized. The pitching high-precision positioning structure 2 comprises 1 pitching support 10, 1 pitching rotating shaft 11, 1 pitching positioning pin 12, 1 pair of pitching bearings 13, 1 pitching bearing end cover 14 and 2 pitching dense-bead structures (22); during operation, 1 piece of pitching positioning pin 12 is screwed into the pitching dense bead structure 22, when a pitching attitude angle station needs to be replaced, the 1 piece of pitching positioning pin 12 is screwed out, and after the pitching rotating shaft 11 is rotated by 90 degrees, the pitching positioning pin 12 is screwed in, so that the change of the pitching attitude angle of the high-precision positioning structure can be realized.
The azimuth high-precision positioning structure 1 can realize two attitude angle stations of 0 degree and 90 degrees; when the positioning device is used, the position positioning pin 6 can be screwed into the position bead-sealing structure 9, the positioning precision of the positioning pin 6 is ensured through interference fit between the position positioning pin and the position bead-sealing structure 9, and meanwhile, the precision error caused by high-speed work of the centrifugal machine can be avoided. Through screwing the position positioning pin 6 out of the position bead-sealing structure 9, the fixed base 4 is rotated by 90 degrees, and then the position positioning pin 6 is screwed into the position bead-sealing structure 9, so that the change of a horizontal posture station is realized. The pitching high-precision positioning structure 2 can realize two attitude angle stations of 0 degree and 90 degrees; when the device is used, the pitching positioning pin 12 can be screwed into the pitching dense bead structure 22, the positioning precision of the pitching positioning pin 12 is ensured through the interference fit between the pitching positioning pin and the pitching dense bead structure 22, and meanwhile, the precision error caused by the high-speed work of the centrifugal machine can be avoided. The pitching positioning pin 12 is screwed out of the pitching dense bead structure 22, and after the pitching support 10 is rotated by 90 degrees, the pitching positioning pin 12 is screwed into the pitching dense bead structure 22, so that the change of the pitching attitude station is realized.
The principle of the invention is as follows: from the centrifugal force calculation formula, F = m × r × ω 2 shows that the magnitude of the centrifugal force is positive to the mass of the object itself, the distance from the rotation center, and the rotation angular velocity. When the centrifuge runs at a high speed, due to its too high speed, the conventional angle positioning structure is, for example: the self-mass of the leaning block positioning structure, the mechanical bearing positioning structure and the like is large, the borne centrifugal force response is also large, and the phenomenon that the angle positioning precision is influenced by deformation, positioning deviation and the like can occur under the action of the centrifugal force.

Claims (3)

1. A high-precision angle positioning structure for a centrifuge comprises an orientation high-precision positioning structure (1) fixed at the upper end of the centrifuge (21), and is characterized in that a pitching high-precision positioning structure (2) is arranged at the upper end of the orientation high-precision positioning structure (1), and a load working table (3) is arranged at the upper end of the pitching high-precision positioning structure (2); the azimuth high-precision positioning structure (1) comprises a fixed base (4) fixedly connected with a centrifugal machine (21), an azimuth rotating shaft (5) is axially and fixedly installed at the central position of the fixed base (4) through an azimuth bearing (7), an azimuth bearing end cover (8) is arranged at the upper end of the azimuth bearing (7), 2 azimuth positioning holes (19) are formed in the upper end face of the fixed base (4), azimuth dense bead structures (9) are arranged in the 2 azimuth positioning holes (19), and the azimuth dense bead structures (9) are connected with azimuth positioning pins (6); every single move high accuracy location structure (2) are including every single move support (10) of suit on position rotation axis (5) upper end, every single move support (10) are installed in the upper end of position high accuracy location structure (1) through position locating pin (6) location, every single move rotation axis (11) are installed through every single move bearing (13) in every single move support (10), every single move rotation axis (11) upper end fixed connection load table face (3), and the one end of every single move rotation axis (11) is equipped with every single move bearing end cover (14), radially be equipped with 2 every single move locating holes (20) on every single move rotation axis (11), all be equipped with the close pearl structure of every single move (22) in 2 every single move locating holes (20), every single move close pearl structure (22) and suit every single move locating pin (12) on runing support.
2. A high accuracy angular positioning structure for centrifugal machine according to claim 1, wherein there are 2 high accuracy angular positioning structures, and 2 high accuracy angular positioning structures are fixed on the upper end of the centrifugal machine (21).
3. The high-precision angle positioning structure for the centrifugal machine is characterized in that the azimuth bead-sealing structure (19) and the pitch bead-sealing structure (22) are the same in structure and respectively comprise a bead-sealing seat (15), a bead-sealing support (16) is arranged in the bead-sealing seat (15), a bead-sealing cover (18) is arranged at one end of the bead-sealing seat (15), and a bead-sealing support (16) is arranged in the bead-sealing support (16).
CN202011327747.XA 2020-11-24 2020-11-24 High-precision angle positioning structure for centrifugal machine Pending CN112371356A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011327747.XA CN112371356A (en) 2020-11-24 2020-11-24 High-precision angle positioning structure for centrifugal machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011327747.XA CN112371356A (en) 2020-11-24 2020-11-24 High-precision angle positioning structure for centrifugal machine

Publications (1)

Publication Number Publication Date
CN112371356A true CN112371356A (en) 2021-02-19

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CN202011327747.XA Pending CN112371356A (en) 2020-11-24 2020-11-24 High-precision angle positioning structure for centrifugal machine

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113701747A (en) * 2021-07-20 2021-11-26 北京航天控制仪器研究所 Inertial measurement system attitude angle error separation method based on centrifuge excitation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113701747A (en) * 2021-07-20 2021-11-26 北京航天控制仪器研究所 Inertial measurement system attitude angle error separation method based on centrifuge excitation
CN113701747B (en) * 2021-07-20 2024-06-11 北京航天控制仪器研究所 Inertial measurement system attitude angle error separation method based on centrifugal machine excitation

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